Top definition
a person who used to be a fat kid (a former fat kid) and is now skinny and fit and even good looking, but they still feel like a fat kid inside and will always think like a fat kid.
Girl 1: I don't understand why he left his shirt on while we were having sex.

Girl 2: It is because of fat kid mentality.
by Girly115 April 06, 2010
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Jun 21 Word of the Day
A person with an outwardly dominant, masculine, or aggressive personality, but who also enthusiastically takes on the submissive or "bottom" role in the bedroom.
"I'm tough, Mike! I never give an inch! I'm partial to taking a few though..."
"Ah, you're a real pipehitter."
by Skeletalchemy June 15, 2021
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