Somebody who makes a move, while the person they are making a move on is clearly weak due to alcohol, distress or sheer unattractiveness, resulting in them being easy. They are therefore preying on the 'scraps' in a similar way to how a vulture hunts
Rob: Look at that girl over there, she's a proper munter!
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.