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."
Mean Ugly Mother Fucker. Usually referring to a gentleman of large physique, generally over 6ft with a Viking/biker like appearance, often astride a motorcycle.
When no riding like a twat can often found in biker bars, drinking copious amounts of alcohol and leading a life of debauchery and mayhem.
Definition:
a. To screw something up beyond all hope of recovery or repair
b. An attempt to undo a clumsy action or poor decision that actually results in a more catastrophic result than if the original action or decision had been allowed to proceed.