The act of searching the floor for stray pieces of
methamphetamine, typically for an hour or longer. This is in part because it's almost always picking through carpet for near-shake. Never involves actual shards or fingers, despite the name, because larger pieces are so much more quickly and easily found.
The effects of meth leads tweakers to compulsively do this, enough that it is a strong indicator of being twacked -- or much less commonly spun out (the sleep deprivation-induced fatigue and the distractability caused by it typically prevent
getting stuck for long).
Notably, no ice needs to have actually been dropped -- if they believe some may have been, that is
often enough for the search to begin -- and the search will frequently continue whether
everything has been found, there never was anything, or all that remains is particles that only a vacuum could extract from the fabric (the last will involve copious cursing and, if no one manages to redirect the seekers' attention, possibly lead to some expression of rage).
