Sideman 

An idiot or jack ass. (Mostly an English colloqualism)

Person 1: Oh look at him, he's a sideman

Sideman by My pseudonym is 'Poop' May 24, 2015

sideman 

sideman (adj) a fat fuck who just plays online poker all day he also does not have any friends and no one likes him cuz she smells he also isnt well with the ladies

Rob SIDEMAN is the biggest fucking retard out there if he walked up a flight of stairs he would break his ankle

sideman by chris seymour March 12, 2005

Sideman 

A person which intentionally leaves out a friend a special occasion e.g a birthday party or an event/outing

Tim is such a sideman he didn't invite me to Thorpe park. Look at those sidemen. What a side he just left me waiting.

Sideman by Pseudonym536 May 31, 2014

Sideman 

a sideman is what Mickey is to Leon.

someone: wheres mickey?
someone: with leon.
Mickey is a sideman and will always be a sideman.

Sideman by tattycat678 July 22, 2019

Sideman Syndrome 

This is the case of being a sideman to everyone, even if you are in a new friend's group you are still a sideman. To identify someone infected with sideman syndrome you must spot the sideman in a group if friend's which are sidemen.

"Oi Mike has sideman syndrome"
"yeah i know that twat is still a sideman even with other sidemen"

Sideman Syndrome by "Mike has sideman syndrome" March 31, 2015

Sidemen 

2 niggas, 4 wigga, and 1 indian nigga who make youtube videos, the best youtubers

Yo did you watch the new sidemen video it’s epic

Sidemen by niggabruh69 January 22, 2020

The sidemen 

The sidemen are the best YouTube group. Ever. They’re all really funny legends. They put out videos every Sunday and they are just really really funny. The sidemen includes KSI, Miniminter, Zerkaa, Behzinga, W2S, Vikkstar123 and Tbjzl. Subscribe to the sidemen.

The sidemen make really good videos!

The sidemen by Meme7 April 24, 2019