Matback 

in other words mattress back describes a fat person you can use it for all people like if they are skinny you would say you single matback and if they are fat you call them a double matback

Girrrrrrrrup big matback

Matback by misterrrjosh November 3, 2019

Manbacking 

Three or more dudes spooning with boners.
Three or more dudes have anal sex in bananna formation.
Three or more dudes with there boners cupping each others asshole.

The three wise men were manbacking in the stable.

Manbacking by the traveling troll October 4, 2010

african-monback 

An african american, standing behind a garbage truck, or any vehicle, attempting to inform the driver how far back to drive

Driver, "go back there and tell me when i get close to the dock,''. African-monback behind truck," monback, monback, monback, ok thats good"

african-monback by harley883 August 17, 2010

manhack 

Derived from the video game "Half Life 2" a "manhack" is a small flying drone armed with three sharp blades that would chase the main character, Gordon Freeman, around during the early levels of the game. This term has been adapted in recent years to describe any AI or remote controlled roto-craft such as helicopter or quadrocopter that is out of human control.

::Two guys in a field::
Guy 1 : So I just got the new firmware uploaded to my co-pilot chip lets try it out.
Guy 2 : Shouldn't you test that out with the engine control unit unplugged?
Guy 1: Fuck you guy.
::1 minute later ::

Guy 1 : Ahhhh manhack!

manhack by Darker November 29, 2010

mansack 

A dudes balls............

Dude i just racked my mansack on that 12 stair before and then i slid on my face.

mansack by Matt December 15, 2004

man-back 

When you are fucking a girl doggie-style and her back is hunched over.

Steve: Hey, I heard you fucked Diane last night.

Ted: Yea I was hitting it doggie but she had man-back and it really turned me off.

Steve: That sucks, my girl arches it perfectly.

man-back by murf09 July 1, 2009

monback 

Short for Come On Back. Typically used when a large object is being guided backwards into an area. big bird

Monback Melissa, monback!!

monback by Anonymous April 9, 2003