goonin' Share definition Flag Created by a very high college student, it is used to describe someone who is very tall, thin, and lanky, and also has red hair. John: "You seen Brad today?" Jeff: "Is that they guy who's goonin'?" goonin' by OrchestraPfeiffer October 15, 2014 0 0 Get merch Get the goonin' mug. Buy Now — $32.95 See more merch