>>120213349some random artist on Twitter made an image with the text, people replicated it, someone voiced it, animations came about, turned into a bit of a fad
as for pogchamp, I do believe pog means "play of the game", pogchamp is this face some guy made in a stream and it got used to represent "hype moments in video games" or something like that on Twitch, eventually it bled through to the rest of the internet, losing a lot of its meaning in the process ("wow this is so poggers" and other such uses)
(the guy whose face makes up pogchamp went on to talk some dumb shit about the whole capitol situation (don't ask me, I don't give a shit) so Twitch removed the emote from the site, hence those 2 replies up there)
