a rolled-up strip of material inserted into the end of your spliff, usu. made from thin cardboard. this term originated in the town of sudbury (ontario, canada) sometime in the 1990s. no one knows where it came from or why it is used in this way, but everyone in this town knows what 'tweet' is, and cannot use the term outside of the bury.
"yo, got any tweet?"
"yo, the tweet fell out of the dube"