french sitting

My mate James a few years ago was in French class and while he was sitting down he pulled down just the backside of his pants to let his butt free

Person 1: Hey mate, I'm French sitting
Person 2: Oh yes bro, that is so chill

French Wall Sit

When one person takes a seated position with their back pushed against a wall much like the "wall sit" exercise position. A second person will then press there ass against the first individuals face, pinning their head against the wall. Then, with as much force as person two can muster, shit into the face of person one.

Don't work out in front of Jason, he'll give you a French wall sit.