a hand shake originating from Baltimore used amongst males,to give kudos on a joke,comment, or diss.it is done by turning the hand into the shape of a bird's beak and tapping them vertically.
Guy 1: that was 1 triple dipped,double deep fried,greased up,butta head.
Guy 2: hell yea that broad was. gimme some birdseed on that.
(then proceed with the tapping of enclosd fingers vertically,may also resemble fingers performing the 69)