One with a face that goes ~wamb~ like the front of an airplane or, spaceship, in it's aerodynamicy and shape. A Janet de Spaceship moved easily through air currents, although some of her extremities limit her flow. These extremities sometimes include sirens, hair, rockets, fat rolls, bracelets, and sometimes wheels. The face is accentuated by a large nasal horn, or sometimes, cavity which radiates bitchiness and retardedness.
A 'Janet de Spaceship' is usually a drunk whore.
"That chick's nose is ****ing huge, she looks like a Janet de Spaceship."
"You're too drunk, Janet, let's get you back to your spaceship."