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1.
Refers to jerks in trucks that think they own the road and drive like morons. Could be any vehicle from a pick-up to a semi.
"That guy just cut me off! Ass truck!"
by sunsetfunset November 11, 2007
 
2.
When a large group of attractive women show up at a social event or gathering.
The Ass truck has arrived!
by The Real Scuba Steve January 04, 2010