tegan blue Share definition Flag 1. unofficial name of a tasty plum. 2. a slutface 1. "i ate a tegan blue today. :)" 2. "aw minion! this heroin huss loves her tegan blue." tegan blue by shushminion December 15, 2008 0 0 Get merch Get the tegan blue mug. Buy Now — $32.95 See more merch