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Abbreviation for You Are All A Bunch Of Idiots. Pronounced "yah-boy". Direct response to YOLO and other such retarded internet abbreviations.
Guy 1: "Hey i heard u got that girl pregnant"
Dumbass 1: " Ya man but hey YOLO"
Person 3: "YAAABOI"

Guy 1: "Hey i heard that you broke ur leg falling off the balcony at that party"
Dumbass 1: "Ya but hey YOLO"
Person 3: "YAAABOI"
by sockus July 23, 2013
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