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1.
Singular of Twix; a single caramel and chocolate covered cookie bar. Much like a quark, the twik is rarely observed on its own.
The true test of self control is whether you can stop after just one twik.
by Evil Mad Scientist January 16, 2009
 
2.
A non-gender specific term that can be synonymously used with

a) Cunt, twat, bitch

b) Dick, prick, Jack-off

Used to describe an individual who displays arrogant or aggressive behavior.
Stop acting like a twik.

Don't be such a twik.

He/She/Zee is such a fucking twik.
by ViralZombieSlayer December 15, 2013
 
3.
(pronounced "twick")
Twig + Stick = Twik

Describes a tall, skinny, ugly person. Some, but not all, are geeks, nerds, or dweebs.
Paris Hilton is a twik.
Most computer programmers are twiks.
Supermodels are usually twiks.
by _allismine_ June 30, 2006
 
4.
Somebody who fidgets alot.
Bill:Frank stop fidgeting you look like a twik.
by pserozaz December 14, 2009