Noun. (vb. to mumf.)
Muffled shouting; the sound made by someone trying to speak or shout when they have something in or over their mouth (e.g. a gag or a hand). More commonly used in the form "mumfing" than "mumf."
First coined by Lobsterling in a
Dirk Gently's Holistic Detective Agency
fanfiction on Archive Of Our Own, 9/10/
2020.
"With a hand clasped over his mouth, the swearing became a furious mumfing."
"Their
words became mumfing for a
good few seconds before they realised they could no longer speak."
"Thrashing in zir restraints,
ze began to mumf frantically."