Urban words tur-teen

Mexican alarm clock: Can also mean: when a person removes their pants and underwear and climbs over a sleeping person so that their asshole is approximately 3 inches away from the sleeping person's face. The person performing the act punches the sleeping person in the stomach as hard as possible to wake them up. In theory, the sudden shock of being woken by the punch will cause the sleeper's head to come up and forward, thrusting their nose into the other's ass. 

See also:brown-nose, Sanchez's wakeup call

Example* We woke up John with a Mexican alarm clock this morning, he says he can't get the smell of shit out of his nose.