Pure brilliance 

When something is really sick

Yo that's pure brilliance bro

Pure brilliance by daygirl1998 February 23, 2017

Pure dead brilliant 

A phrase used in Scotland that means 'the best' or something along those lines.

1. Jock: 'Did yae see that new filum on sat'day?'
McDonold: 'aye, it was Pure dead brilliant!'

2.'Here, Jimmy, that bottle o' bucky was Pure dead brilliant

Pure dead brilliant by Alex July 23, 2003