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The feeling you get from wearing a wooly sweater that your nan made that makes you itch like crazy and your skin crawl.
Man I cant wait for christmas to end this sweater my nan gave me is soo tatchy
Tatchy by Shingademous June 13, 2010
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The best person you will ever meet. He is literally flawless. He is usually the smartest, most athletic, and funniest person in your class/ friend group. You will usually spot him talking with his big group of friends.
"Dude how did Tathya get a 100% again"

"I know right! He had a football game last night and he still aced it"
Tathya by Bruh_moment_69696 November 30, 2020

Tachy Goes To Coventry 

A term used by vBulletin forum software to define its 'global ignore list'. Administrators of a forum can choose to put a user on this list. Their posts can be viewed by themselves, but all other users do not see their posts on the forum.
Forum Administrator: I think we need to Tachy Goes To Coventry that user already.
A very small person or amount; tiny. Originated from a famous music hall comedian from the late 1800s named "Little Tich," who was about four feet tall. Not to be confused with tetchy (irritable).
I went out with that boy again last night, and he sure was titchy, so I dumped him!

Give me just a titch more coffee.
titchy by pearadvocate July 3, 2005
A theoretical particle beleived to travel at a speed greater than that of the speed of light. So far it has avoided detection by even the most powerful particle accellerators.
Your as elusive as a Tachyon.
Tachyon by Kirby Peawauket February 16, 2005
Tetchy (tech-ey): adjective

Easily irritated or annoyed.

Synonyms: cranky, fractious, irritable, nettlesome, peevish, peckish, pettish, petulant, testy, techy.
"As a critic gets older, he or she usually grows more tetchy and limited in responses."

"z0myg0sh, the dude at that place where we did that with those people was really tetchy!"

"Not the least tetchy of his countrymen."
Tetchy by Fuzyhamster October 17, 2006