When a man pulls out during sex and ejaculates into a girl's belly-button, filling her belly-button up with a man-made lake of jizz.
Tony and Jane were having sex in the missionary position. Right before he reached climax, Tony pulled out and filled Jane's belly-button with his ejaculate, creating a reservior of ejaculate in her belly-button. Jane proclaimed, that is a jizzervoir.
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 $2 million.