When you try to cum in your girl (or guys) mouth but only hit the lips.
I finally talked my girl into letting me cum in her mouth but it was a total rim shot.
By Muire
Rim Shot
When your boyfriend is fucking your mom from behind without your knowledge, pulls his dick out to ejaculate, and from 2 ft back lands his cum perfectly in her ass hole.
Jim -"I had to make a rim shot last night so i wouldn't wake my parents" Carl - "I tried that yesterday, but it kept going into the toliet water" Jim - "Practice makes perfect baby"