A way to get your siblings to leave you alone. It means that they arent really fat but you see them being that way. Or used as a really bad come-back when you absolutely have nothing else to say.
(Younger sister is bothering you)
Older sister: You are theoretically fat!
Younger sister: Haha thanks! (and leaves)

or
Person 1: Your ugly
Person 2: Your theoretically fat!
Person 1: Your mama's theoretically fat!
Person 2: No you didnt!
door pinkzebra1 18 juni 2011

Dagelijkse gratis email

Vul hier je e-mailadres in en ontvang elke ochtend gratis het Urban Woord van de Dag!

De e-mails zijn afkomstig van daily@urbandictionary.com. We sturen nooit spam.

×