Grump Truck 

A highly elusive vehicle that spends it's time circling neighborhoods and selecting random people to run over. In turn putting said individual in a foul mood.

Damn, Billy is in such a bad mood. He must have gotten hit by the grump truck again.

Grump Truck by A Pissed off Rhino June 19, 2009

Gump Truck 

Short Bus

Esther and Hank wore their helmets and double seat buckles on the gump truck ride to school this morning.

Gump Truck by Bobberino9999 December 24, 2010