look up any word, like donkey punch:
Lady sauce is a (disgusting) term for a women's period. Can be used amongst girlfriends* or derogatorily by men**.
*Susie: No I can't hook up with Tommy tonight, I'm on my lady sauce.
**Tommy: I would have f!@#$ed her, but I don't wanna get her lady sauce all over me!
by zoozujéan October 04, 2010