Top Definition
Titin is a protein that in humans is encoded by the TTN gene. Titin is a giant protein that functions as a molecular spring which is responsible for the passive elasticity of muscle.
Titin is also the longest word in English language, it has 189,819 letters in total.
Teacher: Class, spell Titin.
Student: You mean that 5 letter word?
Teacher: No the full name!
Student: But that's 189,819 letters long!
Teacher: STFU and do it, get it wrong and get an hour detention for the rest of your school days here!
by Dr.Bsc March 24, 2013
3 more definitions
Basically the best gal you will ever meet. God must have spent a little more time with this gal. Meeting her is like meeting heaven. She's beautiful, charming, sweet, funny, intelligent, and very talented. Just her smile can melt your heart. Her voice can make you forget your worries, just thinking about her would wanna make you smile. You'd be the luckiest guy alive if you get to meet Titin.
I've finally found my Titin! i can die happy!--
by BaybehDadeehh January 02, 2011
A girl who is Elegant, Sweet, Mysterious, Fun, Kitten-like, Ambitious, and most of all.....HOT!
Girl you are so Titin!
by Kristin (This is my nickname) December 01, 2004
A retarted whale that can't swim. A professional asswiper, that cleans with so much percision and perfection. A loser at most, someone who believes that they will make it in life, but doesn't really have any fucking clue to what their life will end up like.
Man this dude is such a titin, come one grow up already.
by Micheal Jamm August 06, 2009

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