Top Definition

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

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.