Defined as a squirrel or chipmunk with an affinity for collecting food from a human's hand.
Alternatively, a derogatory term for a sexually promiscuous woman, who will in all instances swallow.
I've got a couple of Nut rats, hanging out in my backyard, they are chill being fed out of my hand.
Alt: Chantal is nasty boi, that bitch a Nut Rat!