hefty chonk Share definition Flag A hefty chonk is usually a cat which is so fat it can barely do anything normally. me: OH LAWD HE COMING,guy: who?me: THE HEFTY CHONK hefty chonk by peggy_the_chink September 22, 2019 0 0 Get merch Get the hefty chonk mug. Buy Now — $32.95 See more merch