Ponce

"Poncy little twerp!"  What a wonderful insult.  Almost as good as "you bull's pizzle, you stock-fish!" from the Bard.


From Online Etymology dictionary:

ponce 

1872, slang term, chiefly British, originally "a pimp, a man supported by women" (pouncey in same sense is attested from 1861), of unknown origin, perhaps from Fr. pensionnaire"boarder, lodger, person living without working." Meaning "male homosexual" first attested 1932 in Auden.

[With thanks to Piet]