savageorange said:
Pog is a what, not a who (collectable discs with which you can play the game of 'Pogs')
Poggers is a 'abbreviation' of pogchamp, which itself is .. actually pretty mundane and obvious in meaning:

https://www.dictionary.com/e/emoji/pogchamp/

I guess the simplest translation would be something like: "HYPE!"

remember when The World Ends With You had a canon AU where everything revolved around Pogs?