Top Definition
A time betweeen thirty and forty.

no, not 35.

What time is it?

Eight firty.

Um.
by Flooooooooo September 09, 2007
Adjective: Simultaneously embodying the traits of both fat and dirty.
"Man I was in Ashley's room the other day and found EVERY fork we own"

"That girl be firty!"
by dr. diddy March 14, 2010

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