What is Goomah?
1.
a mafioso's mistress
Big Paulie told his wife he was out with the boys, but really he was bangin' his goomah at a hotel.
2.
Mafia speak for mistress or girl on the side.
A: You going out with your wife?
B: Nah, I thought I'd hit a movie and dinner with my goomah instead.
See
3.
The name of my Dads boat
"I'm going out on Il Goomah"