Top Definition
Based on the baby boomer era term "I haven't the foggiest idea." used to describe a complete lack of an answer when someone asks you a direct question.
Dan: Hey bro, I saw you called earlier, I was sleeping all afternoon. What do you wanna do tonight?

Jeff: Shit, I haven't the fuckest, I was gonna ask you the same thing!
by SupaniceMc May 28, 2012
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