someone who is bisexual.
someone who likes both genders.
someone who likes 50% girls and 50% boys.. hence the name fitty.

a really really popular bisexual.
"Check out Fitty, mackin on both the girls and boys!"

"Hey Fitty! Your fucking awesome!"
by lblock August 10, 2006
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Fitty is a language that kids between the ages 10-14 use to speak in a funny way! It means friend, or someone's name.
Hi Fitty, Don't be a juty
by SlowpokeBrodie November 7, 2015
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"Have you seen Nirali Shah recently?"

"Yeah, she's a fitty fitty!"

"I know, right!!!"
by Knargle February 10, 2012
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Dutch slang word for 'fight' (as a noun, not as a verb), possibly originated from Suriname.
Wrong: You don't want to fittie with me!
Right: Yesterday, she had a huge fittie with her boyfriend.
by ceciiile September 28, 2009
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compliment: aimed at young females (Strikly between the ages of 17 and 29)
with a desirable figure combination of breast and bum at least 8+/10 (Akbar sliding scale).
Summers here did yhou see the fitty in the skirt?

The party was crammed with fitties (pl)
by Admiral Akbar April 22, 2005
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such a hot girl that you would die if u were with. dani verrall epitomises what it is to be a 'fittie'
danica rose verrall
she a fittie
by me.bird July 21, 2008
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(n) A numerical amount; fifty. Five counts of ten.
"They musta been fitty 'o dem!"
by Bystrick March 23, 2003
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