A sex position in which the
male hangs upside down by his ankles by a rubber cord attached to the ceiling. The female hangs on with her hands to whatever it is the
male is hanging from, and this produces a nice bouncing effect with the rubber cord.
The term comes from the rubber cord used to attach the
male's ankles to the ceiling with, and the term "mallard" is
due to the fact that the male, when hanging upside down, resembles how a mallard looks when it is being
hung upside down after being hunted.
The term is also the inspiration for a famous Ultimate Frisbee team, the "Rubber Mallards"