From the little-seen 1974 Muppet Show pilot, “Sex and Violence.” I have never seen a comedy sketch that so accurately mirrored my own internal dialectic, or indeed my own early-in-the-morning incoherent mutterings. According to Muppet Wiki, the script describes the characters as

Two really gross clumps of crud - fabric - feathers and foam - maybe just mouths - realistic red interior and teeth. One has [a] club which he smashes the others [with] from time to time. The other hits with [his] fist. They just make guttural sounds to each other - dialogue is to show inflection only and is completely unintelligible.

These creatures are identified in the official Henson lexicon as “Heaps.” I wonder if they’re related to Marjory?