Mansty 

when a rather older man who is also rather over weight dresses up (or cosplays) as Misty from pokemon.

Man+nasty+misty = MANSTY

can also replace the word 'nasty'

dude, that filth is mansty

Mansty by NekoChan99 May 20, 2010

Mastylock 

When ones main hand becomes stiff and starts to twitch out of control. Chronic masturbation is the leading cause of this common teenage male disease.

Symptoms:
Sudden urge to relieve one self
Bulging fore-arm muscle, with inverse proportion to the opposite fore-arm.

If one finds another person/persons with "Mastylock", it is highly recommended to stand back and then state clearly who currently has it and what it is.

Warning: Staring at someones "Mastylock" can sometimes cause the looker to catch "Mastylock", depending on ones sexuality.

"Oh my god Kieran has Mastylock! Its when someone masturbates so much thier hand locks up!"

Jac is a faggot.

Mastylock by bob schumacer April 2, 2011

mansterooni 

A person who slaps their thighs together

Some sluts are Mansteroonis

mansterooni by Frankane April 13, 2015

Manstruating 

When a male is going through a period of increased irritability and moodiness.

Geez, Jermaine, what's up with HB? He's been so pissy lately. He must be manstruating. Give him a manpon.

Manstruating by Pucas Leters April 15, 2008

mantyhose

support "hose" for men. Rather than pantyhose that women wear.

My husband had a blood clot in his leg, so he now wears mantyhose every day.

My husband's mantyhose is WAY more expensive than my pantyhose.

mantyhose by oshimama March 10, 2009

MANstrual cycle 

When a man who is normally quite kind and level headed, goes completely moody and rude for a couple of days. They will have all the moodiness and irritability of a girl on her period, hence MANstrual cycle.

Person 1: Jeez, what's going on with Jim? He's never this moody.

Person 2: it must be his MANstrual cycle.

MANstrual cycle by livelyliv September 1, 2013

manstruationing 

when men act like bitches all month long

Oh my God he must be manstruationing he's acting like a bitch!

manstruationing by Deecee February 25, 2015