Inserting your penis, dildo, strap-on, fist, ect. inside someone's ass while they are pooping to push the poop back up their ass.
The man put his penis inside the girl'sass right as the poop started to come out, causing the poop to go back in her ass and causing them both to have a not so pleasant feeling but the great feeling of knowing that you accomplished it.
-he is mud plunging her, he mud plunged her, she plunged herself, I mud plunged that filthy whore-
(hint: it would make your life easier for you if you didn't tell people that you mud plunged someone)
A Shackteau is a humble, weather-beaten, structurally questionable shelter located in a spectacular or highly coveted place—Wales, Jackson Hole, Sun Valley, Crested Butte, coastal Maine, the Alps—where the building itself may be worth almost nothing, but the dirt, view, access, and mythology make it absurdly valuable.
In use:
Shackteâu - We thought it was an abandoned shed until the realtor called it a rare alpine Shackteâu with unobstructed views and listed it for $2million.