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).
Man, he was so twacked last
night; he was shard farming the whole
time I was over there.
Hey, you remember when we spent
like four hours shard farming in that hotel when you dropped the sack?