A competitive sport, best played in public spaces. Won by penetrating the enclosed space created by a person's arm (when placing their hand on their hip/head/a wall/another person) with one's own arm, as many times as possible without being caught.
"Tim and I were arm-holing so many people on the dance-floor last night! He nearly got punched in the head!"
by Superfreak April 01, 2012
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