If you’ve spent even 10 hours wandering Borderlands 4’s chaotic, loot-strewn planets, you’ve probably already stumbled on a handful of silly hidden easter eggs the franchise is famous for. One of the most sought-after right now is the Potty Mouth Borderlands 4 easter egg, a tiny but hilarious unlock that gives your vault hunter a custom voice line pack and a rare toilet-themed trinket for your weapon. I spent three evenings chasing this down after seeing a clip of it on TikTok, and made almost every mistake possible along the way, so I’ve put together this no-fluff guide to help you unlock it in 15 minutes or less, no hidden hoops to jump through.
What Makes Potty Mouth Borderlands 4 Worth Tracking Down?
You might be wondering why thousands of players are wasting time hunting for a toilet-themed unlock when there are legendary weapons to grind for and bosses to beat. The truth is, this easter egg comes with real, usable perks on top of the silly jokes. First, you get 27 unique custom voice lines that trigger every time you land a critical hit, reload a weapon, or revive a teammate in co-op. The lines are all family-friendly enough for most streams, but absurd enough to make your friends snort-laugh mid-fight.
You also get a legendary "Toilet Seat Trinket" that adds a 2% damage boost against all human enemies. That might seem like a tiny buff on its own, but it stacks with other damage modifiers, class mods, and anointment bonuses, so it’s actually a surprisingly useful addition to endgame builds. The unlock also comes with a hidden secret trophy/achievement that counts towards your 100% playthrough completion, and it’s available to all base game players, no DLC or pre-order required.
Step-by-Step Walkthrough to Unlock Potty Mouth
Before you head out to grab this unlock, make sure you meet two simple prerequisites: you need to be at least level 12, and you need to have completed the main story mission "Dumpster Diving" on the planet Pollux V. If you haven’t finished that mission yet, the area where the easter egg is located will be locked off, and you won’t be able to interact with the trigger item. Once you’ve checked those two boxes, follow these steps exactly:
- Fast travel to the Sludgeworks Junkyard waypoint on Pollux V, and head to the far northwest corner of the map, past the group of rabid skags camped by the crashed cargo ship. You’ll see two stacked blue shipping containers tucked against the map boundary.
- Interact with the rusted portable toilet that’s wedged between the two shipping containers 3 times in a row, then step back and wait 10 seconds for the door to pop open. Don’t touch the toilet again during the wait, or you’ll reset the interaction.
- Defeat the 3 level 15 goons that spawn out of the toilet, then pick up the glowing "Mouthy Toilet Seat" item that drops from the last enemy. If you’re playing co-op, only the player who first interacted with the toilet will get the drop, so have each team member take a turn if everyone wants the unlock.
- Take the item to the vending machine named "Porta-Potty Pat" located just outside the Sludgeworks Junkyard entrance, and trade it for the Potty Mouth pack. The unlock will be added to your inventory immediately.
Once you complete these four steps, you’ll have full access to the Potty Mouth Borderlands 4 content immediately, no extra quests required. I messed up the 10 second wait the first two times I tried this, so I can confirm that rushing the process will just make you waste more time in the long run. If you do accidentally reset the interaction, just fast travel to a different waypoint and come back, the toilet will reset to its default state.
Common Mistakes to Avoid When Chasing This Unlock
I’ve seen dozens of posts on the Borderlands subreddit from players who can’t get the easter egg to trigger, and almost all of them boil down to the same small mistakes. First, don’t try to unlock it with a character below level 12. The toilet will show a grayed out interaction prompt if you’re too low level, and there’s no workaround for this requirement. You can bring a higher level friend to clear the area for you, but you still need to hit level 12 yourself to get the unlock.
Never use rocket launchers or grenade mods near the toilet before you finish the interaction. If you blow up the toilet by accident, it won’t respawn until you fast travel away and come back, which can add 10 extra minutes to your run. I made this mistake on my first attempt when I tossed a grenade at a skag that snuck up behind me, and I had to loop all the way back to the main settlement to reset the area.
Another mistake players make is assuming the Potty Mouth Borderlands 4 unlock is tied to pre-order bonuses, but it’s available to all base game players, no extra purchase needed. You also don’t have to beat the main story to get it, as long as you’ve finished the "Dumpster Diving" mission early on. If you lose the toilet seat trinket at any point, you can go back to Porta-Potty Pat to get a new one for free, no need to redo the whole easter egg process.
Creative Ways to Use Your Potty Mouth Unlock In-Game
Once you have the unlock, there are tons of fun ways to get the most out of it. The voice lines are perfect for co-op play, since your whole team will hear them every time you land a crit. I paired mine with a high fire rate SMG build on my Siren character, so the lines trigger almost constantly during fights. It made our recent run against the Verminous Worm world boss way less stressful, even when we were on our last revive.
The 2% human damage buff from the trinket is way more useful than it sounds for endgame content. Most enemies in the Proving Grounds endgame runs are human bandits, so stacking this trinket with a human damage anointment and class mod can give you a noticeable damage boost during tough clears. I’ve even seen speedrunners use this trinket to cut a few seconds off their boss kill times.
The Potty Mouth Borderlands 4 voice pack has 27 unique lines, so you won’t hear the same one over and over even if you’re using a fast firing weapon. If you do get tired of the lines, you can toggle them off completely in the audio settings menu, no need to uninstall the unlock entirely. I usually turn them off when I’m streaming to avoid any unexpected TOS hits, but keep them on for private playthroughs with friends.
At the end of the day, the Potty Mouth Borderlands 4 unlock is one of those small, silly touches that makes the Borderlands franchise so beloved by fans. It doesn’t break the game or give you a massive advantage, but it’s a fun little reward for exploring off the beaten path, and the voice lines never fail to make my co-op crew laugh. If you’ve got 15 minutes free next time you log on, it’s absolutely worth tracking down, even if you’re just going for 100% completion. Drop a comment below if you run into any snags while unlocking it, I’m happy to help troubleshoot.