oi oi Share definition Flag What people will send to you if they secretly have a crush or feelings for, but are just too shy to say so. "yo dude, the other day this girl sent me oi oi, she must really like me." oi oi by puglord February 27, 2018 0 0 Get merch Get the oi oi mug. Buy Now — $32.95 See more merch