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

Moist potato 

When a woman takes a baked potato and pushes it into her wet vagina. Then she squeezes the contents of the potato out and a man eats it.

My wife gave me a moist potato.

Moist potato by Weinerbutt May 6, 2014