(v) Urinating on a willing girl after consuming vast quantities of Mexican beer. Can also mean to urinate in a gilr's ass and then having her shiss all over something or someone.
Hey, dude see that girl over there? I showed up at her place with a mini-keg of Dos Equis last Cinco De Mayo and gave her a Mexican carwash!
by mhibma August 30, 2005
I ran in to buy some cheetos and a soda, and saw my friend through the window using the gas station squeegee to give his car the ol Mexican Carwash.
by Peanut_Butter! March 25, 2013
by Dave the Carpenter May 18, 2023
I told a friend what a Mexican carwash is and he puked, cut off his toes and removed all the oatmeal and canned corn from his house.
by keepthetruthhidden1 July 11, 2009
When you have anal sex with a gay mexican, and pull out and make him suck your dick. Hence washing off your member.
by mexican carwash June 14, 2007