Green’s Dictionary of Slang

bag up v.²

[? to fold up like a SE bag]

(UK/US black/W.I. teen) to laugh very hard at something.

1997–2000

College Sl. Research Project (Cal. State Poly. Uni., Pomona) 🌐 Baggin’ up (verb) Laughing uncontrollably. [University of Delaware, Newark, DE].