The act of a unique handshake, in which you place your hand in the formation of a letter 'C', then proceeding to grab the forearm of the given recipient, so in turn, both subjects' hands are latched onto their counterparts forearm, then proceed to grunt & behave in a macho army fashion.
"What, you scored 20 bucks!? CONTRA HANDSHAKE!"
"Thank you, my brother-in-arms... (Contra Handshake)"
"Thank you, my brother-in-arms... (Contra Handshake)"
by Johnson Smith Esq. December 11, 2006