A fat or aggressively fluffy animal.

Internet persona(s) who happens to follow you and you happen to follow them back and maintain communication with and have a mutual liking for eachother whether it be friendship wise, etc. (Mutuals if more than one mutual)

that which is fat or large, in a way that is majestic

(noun) First seen in an Internet meme that began circulating circa summer 2018, the word “chonk” refers to an aggressively chubby housecat.

According to the cat girth scale depicted in the meme, a cat is a chonk (or chonker) if it has between 30 and 60 percent body fat.

Variations: chomk, chonker, heckin’ chonker

A fat cat
OH LAWD HE COMING

Chonk is an internet slang term used to describe overweight cats that grew popular in the late summer of 2018 after a photoshopped chart of cat body-fat indexes renamed the "Chonk" scale grew popular on Twitter and Reddit. Additionally, "Oh Lawd He Comin'," the final level of the Chonk Chart, was adopted as an online catchphrase used to describe large objects, animals or people. It is not to be confused with the Saturday Night Live sketch of the same name.

The original chart has a copyright date of 2012, so the meme dates back to at least that far.

A really big human or animal