Top Definition
Cool.Fucking.Story.Bro

Used in times where just cool story bro inst enough to express real feelings.
Girl 1: "Im on my period! =D"
Guy 1: "csb"

Girl 2: "When I took out my tampon, blood went on my nails! D:"
Guy 2: "CFSB <<"
by AnnieCanwanie February 19, 2011

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