Definitions by MayContray

size jack

A person (male or female) who prefers average-sized penises.

Who do you think she slept with last weekend?
Probably William. She’s a size jack and he’s pretty average down there.

size jack by MayContray January 9, 2021

size jack

A person (male or female) who prefers average-sized penises.

Who did she want to sleep with?
Probably William. She’s such a size jack and he’s pretty average.

size jack by MayContray January 9, 2021