when going through a sexual act (usually oral) and finding something disgusting, but having to continue what you were doing because you feel morally obligated to.
me: i remembered when i opened a bottle of fish sauce, it smelled exactly like my ex when i went down on her.
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.