Definitions by trollmeat

Moist Potato 

Moist: When a female becomes sexually aroused.
Potato: A person who is brainless and unaware of anything.

Moist Potato: A sexually aroused brainless girl.

Person1: Hey, I think that girl likes you.
Person2: Yeah, but she’s a moist potato.

Moist Potato by trollmeat January 2, 2018