CUSHION LEAN

The almost imperceptible tilting of the upper body caused by lifting a butt cheek off the cushioned seat of a restaurant booth in order to discreetly pass gas.

Todd: Eww, damn bro! Did you just fart?!
Ted: No, wasn’t me, man! It was the dude in the booth behind you. I saw him do a cushion lean right before the stink engulfed us.