red pubic hair shaved into the likeness of a lightning bolt, primarily used in reference to your tight-assed rugby playing sister
My God, your rugby playing sister has such a hot ass! I'd love to trim her moneysauce!
by guadalupe muslimo November 10, 2003
A defining moment in competition to belittle your opponent.
that full house was "money sauce," bitch.
by Brandon June 16, 2006