What is the meaning of Posh?

Associated with the upper classes.

Stylish; elegant; exclusive; luxurious; expensive.

Snobbish, materialistic, prejudiced, under the illusion that one is better than everyone else.

An exclamation expressing derision.

A halfpenny or other coin of little value.

Money.

To make posh or posher (more posh).

A sudden and heavy fall or gush of rain or water.

Fragments produced by an impact.

Slush.

cat

cat

dust

Source: wiktionary.org