First date left cheek sneak

When you're on a first date and trying to present your best self, but the pizza you just ate isn't sitting well with you and you need to let out the beast within. So you subtly lean to the right and silently let out your discomfort, only to immediately sit on it to avoid detection.

"Dude, my date with Tracy didn't go so well last night. She just got up mid-meal and left."

"She must've detected your first date left cheek sneak, huh??"