The act of a man using his ejaculation (semen) as a lubrication then performing anal on their partner to see if the 'member' exits cleanly.
The Duke being: performing the sexual act after ejaculation as a test of stamina (aka "Balls of Steel")
The Harry being: testing ones luck in prevention of excrement on their shaft (aka "feeling lucky")
Male: "So last night I was with that girl I met at the club, right? Chick wanted me to give her a Harry Duke. I was like: 'Okay, I can do that.'Needless to say: it did not turn out like I planned"
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.