when i clicked on this i totally expected just a bunch of people in skinsuits haha XD
Not to assume, but just in case you don't follow the joke, can appreciate the aha moment if you have had it already, and don't mind an internet stranger overexplaining...
There is/was a popular meme term "me irl" (often stylized as me_irl), which is a shortening of the phrase "this is literally me IRL". It spun off into many related terms and subreddits (gay_irl for queer memes, ich_iel for German/Germany memes, pony_irl for My Little Pony memes, etc). anime_irl is a continuation of that trend, but also has the deeper pun of being readable as aniME_IRL.
It's all very heady and clever, naturally