Acronym for The Muppet's Swedish Chef's saying "Vurt De Furk," i.e. "What The Fuck."
Random Person: Hey, 2020's not so bad. I ain't got Tha Rona yet, and I'm gettin' PAID to lay out my Dollar General job!
Me: VDF broham. Vurt De Furk.
RP: What?
Me: What the fuck man!?