p'shall - A hand flip and a ‘whatever’ all at once. You use it when so

A hand flip and a ‘whatever’ all at once. You use it when someone is telling you a load of crap and you're too lazy to argue.

I did the p'shall. 'Whatever. You're still getting the last slice.'

'P'shall?' he said, flipping his hand. 'You said you’d finish your homework. You're still eating cereal for dinner.'

She gave me the p'shall. 'You're telling me you flunked the test and still think you're cool?'