Its an Emote on Twitch.tv thats usually is supposed to symbolize hype or excitment

A buzz word being used to refer to creators and influencers forming or encouraging unhealthy relationships with their fans. Usually used in the context of young audiences feeling they have a relationship with the influencer due to the huge amount of the influencer’s content they consume. The influencer in question, however, is unaware of the fan’s existence other than the general knowledge of having fans. Common examples include Dream and his stans. These relationships are exacerbated by the influencers confirming they have more than a creator-to-viewer relationship.

The word is circulating due to various YouTube essays about the phenomenon using the word, and therefore people who enjoy complaining about influencers repeating what they heard in the video in any comments section they can find.

Let me give you the complete etymology of this compound slang word.

It is correct that the first part of this word, POG, refers to the abbreviation for "play of the game". {Source: Wikipedia}

And so hence, Pogchamps would technically (and was probably intended to) refer to someone who is so good at a game that they always get POG.

However, gradually, this term has cultivated a new meaning for members of the streaming website Twitch.tv.

Now, Pogchamps exists as a versatile Twitch emote used to convey something or someone that is awesome and cool.
The first part of this term, pog, is also commonly used as an adjective or interjection to convey feelings of shock, excitement, and delight.

There is also now a online Chess tournament called PogChamps.

An absolute legend

Best twitch emote to ever exist. Used a lot by huge twitch streamer TommyInnit.

A great emote twitch removed because gootecks(the face of the emote) had some things to say on Twitter about the capital that twitch didn’t like. Mainly used to show excitement or when something is really awesome. Other variants include pog, or pog with a word in front of it ex.

Tomatopog

Housepog

Storepog

Pogchamp (2) noun, neolog:Sept20,2020CE.

One that suckles excessively during foreplay to the annoyance of their partner. Note: Pogchamping, vt. typ. refs pogchamp(1) whereas Pogchafing refers pogchamp(2).