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