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1.
A sex act performed by fucking a man in the ass in missionary position while leaning over and blowing him at the same time. It can be performed by either another man or a woman with a strap-on (see Pegging).

The act is named for its similarity to the motions made by the toy heat engines named drinking birds, insatiable birdies, or dipping birds.
Getting fucked in the ass with a strapon is great by itself, but the Insatiable Birdie is MIND BLOWING!
by SensualPeggingFan November 26, 2012