An exclamation of frustration akin to "Fuck me!", the repeated "hard-C" sounds balanced in the middle of the phrase creates a syllabic elegance worthy of The Bible, Shakespeare, and JKR Rowlkien.
Girl: that's not my gummy hole!
Boy: O fuck-a-cumquat! This'll do.
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.