When someone, usually out of anger or revenge, defecates on their sexual partner while they are in a deep sleep, most times passed out drunk. When that person wakes up and takes a whiff it reminds them of the time they were at an abandoned house in Maryvale with no plumbing and a toilet full of squatter feces. Then they realize it's them that smells like squatter feces from the abandoned house in Maryvale. Similar to Guadalupe Wake Up Call only not restricted to hotel/motel rooms. (See Guadalupe wake up call)
Damn homie, this morning my sister's room smelled like an outhouse was brought inside. When I asked her what the fuck that smell was she said you must've given her a Maryvale Mudslide before you left this morning. If you guys are going to be fighting, you can't come over anymore.
by Chinooks64 July 14, 2023