Sly Goose

An Act were two friends engage in sexual intercourse behind the back of others.

" Jimmy got gripped in the back of his motor with Steve's Bird getting blew off, apparently he'd been giving her the Sly Goose for a while "

by John Gaskell March 24, 2004

sly goose

A master of the art of conning.

That hamburglar is a real sly goose.

by java monster February 22, 2008

sly goose

When an otherwise ladylike female subtly lifts one cheek in order to decompress air from her derrière. A skillful practitioner will couple this art with conversation or laughter as to dissuade any suspicion should the tuft of air carry an unpleasant odor.

George: Did somebody just fart?
Nancy: I think Rebecca pulled a sly goose.

by Rozu May 5, 2011