A man in in his late 30's/early 40's that abuses far too much cocaine and alcohol to know how to act. Can be used interchangeably with 'jackass'
"Wow, did you see that guy cut me off? What a real Jack Antonoff."
"Am I the (Jack) Antonoff?"

"Jackantonoff Shark Week 2.0"
by curseyoudinkleberg July 31, 2023
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jack antonoff can crush me with his thighs
by owhash December 21, 2021
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