Top Definition
A spasm of the buttuck.... Vigorous twitching in the rear and this phenomona only occurs when the sufferer is disturbed or irritated by peers.
Chelsea: "I think we could all use a good grind and hand crank..."

Rob: "I agree lets do that."

Kasey: "You people make my ass twitch..." O___o

Chelsea: "Hoe shit, shes got the Asum spasm..."
โดย Sucktacular bacheler 21 กรกฎาคม 2010

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