Top definition
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.
by MayContray January 09, 2021
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Apr 22 Word of the Day
When you eat dirt for the first time and leave your family to build a shack in the woods
Bro since I got dirtpilled on Tuesday I have made sooo many worm friends and made them soo many little houses to get married in. Me? Lonely? No you’re the lonely one u lawn owning freak
by ecogoth December 30, 2020
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2
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.
by MayContray January 09, 2021
Get a size jack mug for your buddy James.