stands for "Trendy Indian Bitch."
An Indian girl who is very trendy and very snobby.
Damn, Priti wears Prada to bed and make up to the gym; she's gone super tibby.
by A tibby March 10, 2005
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when a woman has back fat, large enough to resemble a pair of tits created by the strap of a bra.
I was in accounting class yesterday, and couldn't stop staring at my teacher's tibbies.
by sexyaudit69 March 31, 2011
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Affectionate nickname for second Roman Emperor after Augustus, Emperor Tiberius Caesar Augustus.

Did you finish reading those chapters on Tibby, yet?

Tibby reminds me a bit of Professor Snape.
by Skayda December 23, 2006
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tibb•y (tib′i), n., pl. tibb•ies
A short form for Terabyte - a scale to measure digital data capacities.
A Terabyte equals 1024 Gigabyte or 10^12 bytes (a trillion bytes).
The term tibby is fancy slang to express the unit symbol, TB.
Josh: I just bought a 2 tibby drive from Best Buy!!! Store more pr0n!
(...)
Josh: Andy? You hear me? Hey! 2 tibbies!

(Andy is busy skimming his 12 tibby NAS full of porn and other torrented "linux iso"s - for the next 234 years. In HD. Power of tibbies!)
by Glassed Silver February 7, 2012
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a beautiful southern bell who enjoys boys, booze, parties and a little bit of trouble. often misunderstood as a slut because she is pollyamores. a girl who has 10k<3's
i wish i had a tibbie.
by casper 87 February 3, 2010
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noun; derived from the acronym T.B.I. = traumatic brain injury : used to refer to any number of people who happen to be belowe an average level of intelligence, specifically (stupid) girls who love shoes, purses and all things that sparkle and (disgusting) guys whose sole interests include beer, pussy, ignorance and flatulence.
Christopher Reeves was NOT a tibby.
Megan Roome is DEFINITELY a tibby.
by Ryan Christopher Cole December 10, 2006
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When you're walking and someone is approaching from the opposite direction, you both try to pass on the same side, moving left and right simultaniously, until you have an awkward near-collision.
"This morning I was walking to class and this guy and I tibby-tabbled on the sidewalk for like 10 seconds. It was so uncomfortable... I couldn't get by him. We both laughed awkwardly."
by Katie-Paige April 20, 2009
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