MMMMMMMM can be used when you are in a very stressful/uncomfortablesituation 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
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.