A fork of Rural Dictionary
A handshake and/or high five in which money or "guap" is given or recieved "swap". The cash is usually in return for drugs and is typically done in a school environment in order to make the transaction as least noticable as possible.
"Did you see that guap swap dude!" "Yea, I think we are the only ones who saw it, but Alex is probably giving Tyler 20 bucks for the pot he got off him earlier."