A loud little victory yell when something goes your way. You’ll hear it when a goal hits the net, your mate texts back, or you find a forgotten tenner in your jacket. Basically your inner fist pump escaping through your mouth. Often stretched out as get innn, or get in there, usually with a grin and a bounce.
"Opened my old puffer and there’s a tenner in the pocket. Get in! Straight down the offie, mate, drinks on me tonight."