SHAM-POO

Artificial excrement, usually made of soft, boyant plastic.

Is that a real turd or sham-poo floating in the pool, Martha?

shell sham

A reference to young men who grow scruffy beards, wear their hair in a greasy and disheveled fashion and wear surplus military field jackets in an apparent attempt at duplicating the stereotypical media image of a traumatized war veteran.

That young twenty-something with the darting eyes and the spastic movements whom I saw sitting in front of the English department seems to be affecting quite an elaborate shell sham.