A trouser stain is a brown spot on the rear of a person's trousers or pants caused by inadequate use of toilet paper. A Texas Trouser Stain is much larger and is caused by not bothering to use toilet paper.
Take a look at that dudes trouser stain. And check out the Trxas trouser stain on his sidekick.
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.