MMMMMMMM can be used when you are in a very stressful/uncomfortable situation by a specific entity. Usually in this scenario its followed by something else.
Example one: *getting very creeped out by an enemy in a video game* MMMMMMMMM I DO NOT LIKE YOU
Example two: MMMMMMM THIS HERE BE SOME MAJOR BULLSHIT
Me: okay im gonna make a corn dog
Microwave: mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm
1 minutes later Microwave: mmmmmmmmm *exploded* KJWEUR *exploded* KJWEUR *exploded* KJWEUR
another term for a station wagon, mini-van, or any other kind of vehicle that is targeted at the "family" demographic(also M.A.V.)
"Tactical advantages aside, the M.A.V. is top of the line for the holy warrior troop transport manufactured by the Church of Latter Day Saints Military Industrial Complex. Also great for family trips...to heathen lands."