to describe someone, usually a male, resembling that of the fictional yellow canary named "Tweety Bird" in the Loony Toon cartoons. This person has a problem speaking because they smoke copious amounts of weed, is afraid of pussy, and has a rounded top-heavy head resembling Tweety Bird himself. This person is usually very thin, because they eat just like a bird.
"Hey Tweety Bird, i tought i saw a putty tat."
by Dr. Jimmy Brungus November 21, 2011
The mascot for the most amazing BBG chapter in all of BBYO (Beshert BBG). Loves to flop, shmee, and act weird. Colors for Tweety are yellow and blue. Contrary to popular belief, Tweety bird is a boy!
See that yellow thing flopping in the corner? Soo Tweety Bird.
by tburd June 04, 2012