Interplopper 

Someone who comes into a restroom when others are already present and proceeds to have a bowel movement before anyone can leave the restroom.

Before I could finish washing my hands, the interplopper entered the bathroom and the stall, and let out an explosion.

Interplopper by anonymous August 27, 2025

Interlooper 

A person who starts doing drugs and joins a group of people who are heavily into that drug(s) already. Then after a short while, leaves the group because they can't keep up with the group's high level of partying.

Joe - Hey Keith, who's that kid who was at your apartment last night in the corner tweaking out?

Keith - Oh, thats just some interlooper we met the other day. He won't last long partying with us.

Joe - I hope he doesn't od trying to keep up with us.

Interlooper by Hopie Elle March 17, 2008

Loblolly interloper 

Someone who is stupid/awkward and an unwanted meddler

He kept awkwardly reinserting himself into the conversation but it was clear the group identified him as nothing more than a loblolly interloper.

Loblolly interloper by MD girl 5 November 25, 2013

interloper 

Any individual who intrudes or does not belong- in a conversation, at a social gathering, or anywhere else. First popularized by Malachai, of "Children of the Corn".

Friend 1: "Yo, who invited him? Who's that guy lurking in the corner?"

Friend 2: "I don't know who that interloper is, dude."

interloper by J3553 November 27, 2007

interpooper 

Someone who seeks out a bathroom to foul up that is apart from his normal office jurisdiction.

That Norman the InterPooper from accounting stunk up our bathroom again.

interpooper by RoyRudy March 25, 2017

interloper 

Garbage ass chapter of Half-Life

Jim: Hey did you play Interloper? It's my favorite chapter!
Tim: What the fuck Jim

interloper by dakota724 November 9, 2021

intersloper

noun; person that gets in your way while skiing or snowboarding.

I had a good run going until that intersloper cut me off.

intersloper by ARCrider June 22, 2005