Pillion

[Sarah]

A panel or cushion saddle; the under pad or cushion of saddle;esp., a pad or cushion put on behind a man's saddle, on which a womanmay ride.His [a soldier's] shank pillion without stirrups. Spenser.

[Sarah]

The next unit of counting after zillion. It is used to express HUGE amount. A well known movie director's son headed up the scientific study on the word, in the end proving that it scientifically exsist's.

[Britney]

[ass] but [old timey]

[Mary Mallozziberg]

A seat for a passenger behind a motorcyclist.