Top Definition
a "tweeker" speed walking, moving one arm back and forth with full force. "shard" being another name for high quality crystal meth.
"hey man, chill, your shard-arm is in full force and people are lookin at us, attracting the 5-os. chillax bro.."
by mo-naynay June 08, 2009
5 Words related to shard-arm

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