Winning a game in Pokemon Go's GBL (Go Battle League) with the opponent having 2 shields remaining. You must also have used at least one of your shields.
Pokémon GO Addict: I love playing in the 1800 ELO range! Sometimes my opponents don't know what they're doing and end up reverse 2 shield flexing! It's happened 5 times today!
A hardo is a person who tries extremely hard at everything. Most times a hardo will try very hard at things that do not require excessive effort. For example, sports practices, gym class, etc.
Wow did you see Jack at practice today? What a hardo!