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A group of adolescents that hail from northern Massachusetts who enjoy taking part in haggard activities

The act of causing neighborhood chaos, rowdiness, etc.
"I heard UA was out last night, that explains why I saw a burning heartagram, and my car has no more emblems on it."

"Man, my house was totally assaulted last night, i powerwashed the paintballs and eggs off this morning."

"Lets go Urban it up."
by anonymous March 29, 2004
a group of n-words who wreak havoc around the hood next to sunset lake
UrbanAssault was the group responsible for the flaming football incident.
by N-Word T February 26, 2004