look up any word, like bangarang:
 
1.
The sucker who is always the guy or girl who gets voluntold to participate in the worst projects or activities. Usually the "new guy".
Boss: Ummm, yeah, I'm gonna need somebody to come in late on Friday for those TPS reports. Any volunteers?

<silence>

Boss: Ummm, yeah, Sandy? Why don't you go ahead and do that, then.

Fred: Poor Sandy, she's still the group's nominatrix after three years on the job.
by Farmee July 10, 2013
 
2.
A kinky girl who likes to dominate her partner, particularly by biting him all over... hence nom nom nom...
I love my kinky little nominatrix, and am leopard spotted with hickeys....
by SexBat March 07, 2010