Pre-Pooped

Walking into a public bathroom which has (recently) been made quiet stanky by some other person (often anonymous), and then coming out of the bathroom only to be blamed for the lingering stank by the next person in line.

So, not only did you have to deal with another person's stinky stank while using the facilities, you also become the culprit for said stink

Dude #1: You gonna hook it up with that hottie you met waiting in line for the bathroom.

Dude #2: I would have, but after I came out of the bathroom, she thought I dropped the stank, but I didn't - I GOT PRE-POOPED!

Dude #1: Aw man, that SUCKS!