A person that is under the influence of methamphetamines and is in the middle of three projects at the same time none of which will ever be completed.
I watched Johnny search through his bag with one hand while making something with the other,he is such a tweaker.
by Jamie Pheloney April 9, 2005
A person who does Crystal Meth. They talk very fast all the time. You're lucky to get a word in with a serious tweaker. They do obsessive projects ranging from, taking a TV set apart, to cleaning a tile floor with a tooth brush. Not finishing anything is common. The thing about meth is that some people have done so much, that even when they quit, they are so damaged that they retain all the characteristics of a tweaker. Ruined for life.
That dude is such a tweaker, he won't stop talking!
by Roadie Overthegate March 9, 2007
by Yramesor! April 15, 2004
Some one who does crystal aka tweak and has been up for days showing signs by talkng alot pacing around and fidgiting
by Lisa April 9, 2004
A person that can't stay still and is constantly occupying themselves with meaningless activities which will never be be completed.
by Jamie Pheloney April 9, 2005
by Rokki J. Rand October 17, 2007
a person who has been awake,on average,for about 2 weeks without sleeping because they've been abusing speedy drugs(usually,but not limited to:crystal methamphetamine)
by insanegerbil November 23, 2003