A sexual position in which the girl lies facedown, on a bed, table, or simply on the floor, and the man screws her from behind (much like doggy style).
Guy 1: Dude how was that girl last night?
Guy 2: I fucked that bitch servisstyle man!!!
Pajama casual is a term used when working from home and preparing for a video conference. All business above the waist and your pajama pants down below.