"'Pish!' boomed Yar Afzal."

-The People of the Black Circle

pish.

[piSH]

EXCLAMATION

1. a dated expression of annoyance, impatience, or disgust.

Pish may be derived from its opposite, as in the exclamation pish-posh:

posh

(pŏsh)

adj. posh·er, posh·est

1. Fashionable or luxurious: a posh dinning room.

2. Affecting characteristics of the upper class; pretentious: a posh accent.

3. Typical of the upper class, especially in the United Kingdom: a posh upbringing.

[Probably from earlier slang posh, halfpenny, money, dandy, from Romani (dialect of England) posh-hórri, halfpenny: posh, half (from Sanskrit pārśvam, region of the ribs, flank, side, from parśuḥ, rib) + hórra, hórri, penny.]