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1.
Bac
Da
Fuc
Up.

Acronym for the term derived from the Onyx album of the same name.
Pussass nigga! Best BDFU!

Move back, muthafuggaz, the Onyx is here! Bacdafucup, just bacdafucup.
by Phat Pat March 09, 2006
 
2.
Baggin' Da Fuck Up
Did You see Lisa Lampinelli's show last night? I was BDFU!
by KGetzy July 26, 2010