the usage, esp. by smoking of marijuana made popular from Estacada, and now used by stoners everywhere. Used primarily by kids in school as a codeword to smoke the reefer so that administration wouldn't catch on.
CHRIS!! im about to go twalling before lunch, wanna come?
by Nigel Lensch March 13, 2011
1 more definition
The inner walls of a mans anus. T-wall.
Man, I really had a great time playing with my twall today.
by jforbesderulo May 03, 2011