by genesis April 25, 2003

Short for "Mutually Exclusive Sexual Partner." You're not dating, you're not sleeping around. Similar to "Fuck Buddy."
When you only have one sex partner, but they are not your boyfriend/girlfriend.
When you only have one sex partner, but they are not your boyfriend/girlfriend.
by Kerico May 19, 2007

Asian man knocks you accidentally as he walks past
Instead of calling him the obvious word of PAKI you call him a fuckin MESP
Instead of calling him the obvious word of PAKI you call him a fuckin MESP
by Leesa0387 July 24, 2020

by genesis April 28, 2003
