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1.
Permanent Mean Mug Syndrome. When someone's natural facial expression resembles "the stink eye," leading them to permanently mean mug others. Famously exemplified by Erin Kaplan of "The City" on MTV.
"I swear half of his face doesn't work."
"I think he has PMMS."
by feldtronic October 25, 2009
 
2.
PMM
noun - perpetual motion manager: A manager that ignores all objective evidence to why his department is failing and is motivated only by his own bullshit desire to keep everyone in perpetual motion with pointless tasks and status reports.
Doesn't Joe know that micromanaging Sue only makes her more frustrated and makes her generate inferior work? Instead, Joe says that Sue doesn't care and is lazy. Joe is such a PMM.
by frustrated_monolingual March 12, 2010
 
3.
PMM
Makarov
Pistolet Makarov Modified
The Russian Soldier was out of ammo for is Kalishnokov, when he pulls out his PMM and fires his last 7 rounds.
by GunCat February 21, 2004
 
4.
(perverted mexican man)

old (fairly old) mexican man who hints on girls half his age.

They are sometimes too drunk to even realize what they are doing, but most of the time they are just plain stupid and dont realize they have NO SHOT IN HELL with you.
If one would like to actually see a P.M.M, go to East Los Angeles and one is bound to see a P.M.M at any street corner.

If harassed by a P.M.M., curse him out, he is harmless, for the most part.

P.M.Ms usually ride in trucks or "rape" vans; they honk if they like what they see.
by iamironmanx33 August 13, 2010