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1.
The Newfie (people of Newfoundland) word for "window shopping" or browsing.
i was an hour early so i spent an hour twacking 'round the mall.
by Hepsi-Cola February 03, 2010
 
2.
A person fueled by crystal meth who enjoys both tweaking and quacking. This would be twacking. When a twacker reaches the peak of their high, they will both indulge in a number of repetitive useless projects that never get finished tweaking and sit around talking shit on the latest "enemy of the week" quacking. The "enemy of the week or weak!" is the twacker who happens not to be present in the room that night and will soon be replaced by somebody in the room who is absent from the gathering the next week.
He starts the night smoking his pipe and starts talking shit about her who. We can be sure next time she is present and he is not, he will be the subject of the shit talk! Once he is high and project time comes around - he then spends the rest of the night taking apart his car engine with euphoric passion to somehow turn it into a 2000 Honda Accord Version of the Knight Rider! He eventually becomes agitated with the project as he starts coming down. The car is left in pieces for his parents to pay a mechanic for fix. He has spent the night twacking, and the next night providing funds allow, he will engage in exactly the same behavior - different people, different project, perhaps. But SAME ROUTINE!
by annoyedbypeople April 26, 2014