YBOF

An acronym for "Your butt is on fire!" Used humorously to describe someone who's in a hurry, unusually energetic, acting suspicious, or just being dramatic—often for no clear reason. Originates from playful teasing and is typically used between close friends or couples.

"Why are you pacing around the house like that?"
"I don’t know, I’m just trying to get things done!"
"YBOF or something? Sit down!"