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phrase used by the coolest of cool people, to request a summary of what's happening/ what's going on. Can also be used as an introductory phrase or a conversation initiator. May be shortened to simply "diddio?" when pressed for time.
Guy 1: "Hey man, what's the diddio?"

Guy 2: " Not much"

Guy 1: " What's the diddio with that?"

Guy 2: " shittty buz"
by Costalotmungicake September 30, 2011