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1.
n. slang for the testicular region, particularly when said region is struck violently.
He took one in the Texas Pistachio Wagon.
by gert January 03, 2006
 
2.
A killer local band from San Antonio, TX.
Jayson: Dude, are you going to see Texas Pistachio Wagon tonight?

Joe: Hell Yeah, the Wagon rocks!
by humdipper May 04, 2009