Hell hath no fury like a pissed off mother -- TMZ has learned "Cosby Show" star Lisa Bonet is suing over a 2011 car accident, claiming the other driver injured her as well as her young children.
Lisa -- who's married to "Game of Thrones" star Jason Momoa -- filed the lawsuit today in L.A. County Superior Court, claiming she was driving her Audi in Burbank, CA when the other driver (in a Toyota Camry) smashed into her.
According to the lawsuit ... Lisa, her 4-year-old boy and 5-year-old girl ... were all injured during the accident, and subsequently had to receive medical treatment.
In the suit Lisa says she suffered shock to her head, back and neck.
She's suing for unspecified damages.