They're undocumented migrants. /sarcasm
Q: What were the 2 Mexican FireFighting Brother's names? A: Hose A and Hose B
What do you call a Mexican/Spaniard/Portugesian/Venezuilian with a vasectomy?
A dry Martinez.
Why did the Mexican become so excited?
He discovered he could use Right Guard under his left arm...
This Mexican dude was taking a pee on the side of a building and this Texan sees him. After the Mexican is done the texan bloke asks him, "How come you Mexicans don't wash your hands after you pee?"
The Mexican smiles, "Senior, we Mexicans don't piss in our hands..."