C/O stands for class of. Like the graduating class.
We are the c/o of 2029!WOOHOOOOO!
by Kapuschi June 03, 2008
Current offer,Mostly used In Games where you try to make people offer higher and higher on a item your trying to sell
C/o 500k on my huge dragon kanzar in my pants
by MrNagson June 02, 2008