(v) Urinating on a willing girl after consuming vast quantities of Mexican beer. Can also mean to urinate in a gilr'sass 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!
Brought to public attention by Bob Woodward and Carl Bernstein in the book on the fall of Richard Nixon, All The President’s Men, ratfucker was Nixon’s term for a political operative who sows chaos among opponents; an agent provocateur. It is thought to have originated among campus political rivalries at USC, and seems to have some usage in the US military.
Along with Nixon’s other ratfuckers, Roger Stone caused fights at otherwise peaceful Democratic Party protests to generate a false narrative that the Democrats were violent and dangerous.