Pish Posh is used when you know something isnt right. Instead of going YA RIGHT, you simply say pish posh, This term is usually used with older drunken women in north carolina.
Literally translated destained fashion. Other translations: bad fashion (dress or behavior), bad taste. Used when you dont like were the person is going with their thoughts, and/or how the person is dressed.
Example 1:
Person A: They say there is a ghost that lives on this house.
Person B: Pish posh, your just trying to scare me.
Example 2:
Person A: Damn, you have a pish posh of clothes.
Person B: Your clothes are all sorts of pish posh.
disdainfully smart.
(according to the exact definition, pish means expressing disdain while posh mean smart. so when someone says something intellectual, say "pish posh!" just to dis them back. )