''the guy'' is the person at a party that will get completely waisted to the point that they make a fool out of themselves infront of everyone, throw up, break something, or are just very obnoxious
person 1 "bro have you seen joshua?"
person 2 "yeah he's sooo wasted lmao !"
person 1 "yeah he's knocking everything over. he can barely walk"
person 2 "he's the guy"
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