Mainriver 

Somebody who is so mainstream they need defining by a new word.
Calling them mainstream is out of order to mainstream kids.

Oh dear, he likes the Kooks and wears pumps. He is so mainriver.

Mainriver by Joe12112 March 3, 2009

manniversary 

The anniversary of a transgender man's transition beginning. Often marking his first testosterone shot, when he began binding/dressing in male clothes, or whatever he decides 'began' his transition.

Have you seen the FTM 1 year manniversary videos on youtube?

It's amazing how much muscle and hair growth he has-it's only his first manniversary!

manniversary by Ifreyja Vonneu February 1, 2017

Mainliner 

One who does drugs such as heroin by means of shooting up in a vein. Intraveinously

Hes a mainliner druggie

Mainliner by Kyleigh January 28, 2006

manniversary 

Yearly celebration of wedding day of two gay males.

This year, Brad and Josef will be celebrating their third manniversary, though the memories of their Fire Island wedding are as vivid as if it had happened yesterday.

manniversary by OhPuhLeez February 23, 2005

mainliner 

One who injects drugs into their bloodstream with a needle.

Ohmygod, he's not only a mainliner, he reuses his works! Do not exchange any bodily fluids with him no matter what.

mainliner by mjrn April 11, 2006

miniversary

Like an anniversary, a date marking the successful passage of time in a relationship.

They've been going out one week and already have celebrated their first miniversary.

miniversary by P-fizzy December 14, 2005

manniversary 

The day to be remembered when to guys became good friends. Often celebrated with heavy drinking,throwing up, and passing out. The day itself is usually forgotten due the drunken haze of the day so it is celebrated around the same general time each year.

Joe1: You know Joe it was around Labor Day last year we hung out out at your place and got shit faced, Good Times

Joe2: Your right and its about that time of the year now. Happy Manniversary bro.

Joe1: Happy Manniversary

manniversary by DrinkinBuds September 6, 2009