A sexual act performed when a male, while having sex with a female in either the missionary or more preferably the doggy style position, reaches around his backside and obtains a sizeable amount of sweat from his Perineum (a.k.a. Chode, Brum, Taint, etc.). Said sweat is then wiped upon the females upper lip, directly underneath the nose. The maneuver is completed with the male folding each of his arms to resemble wings, flapping his "wings", and vocalizing an ear-shattering "Quack-Quack".
As Brian was ravishing Krista from the rear and giving her the ultimate in sexual pleasure, Krista suddenly felt Brians finger on her upper lip. Within an instant her olfactory senses were overwhelmed by an extremely foul odor, accompanied by the loud call of the Mallard Duck and a rush of air upon her backside presumably caused by the flapping of limbs. Unbeknownst to Krista, she had received the ultimate sexual insult: The Dirty Mallard!
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.