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Phenomenon that occurs when open nugs or loose weed is mistakenly attached to victim's arm and/or long sleeve shirt/sweater/ etc after being left out on table. This usually happens after numerous blunts or joints are rolled often causing spare pot to be unknowingly lost or dispersed among the floor, table, couch, or whatever.
"Look out bro you got some mad weedarm going on"

-or: "hey do you have any pot? I had a fat nug but I got weedarm earlier..."
by shitlips420 January 23, 2010
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