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2.
A man who is generally just follows a boss around without being wanted
Whys John always around when James is here
Cause he's a sideman
by Describer November 19, 2012
 
1.
An irrelevant and powerless guy, also known as a 'flowerman' and shows signs of 'moist' and 'soggy' behaviour.

There are two types of Sidemen:
1) the 'Bupsed guy' who finances a girl's shopping sprees and receives no sex in return.
2) the general wetwipe; often a guy who is emotionally unstable, and isn't rated by anybody -- not even friends.

A Sideman is the male counterpart to a Sidechick.
Chris: What, did Steven beat that yeah?

Tyrone: Nah man, he took her shopping then she ducked.

Chris: Steven is a sideman bruv!
by TheDefinitionOfSlang July 01, 2012
 
3.
A person who just copies everything his/her “friend" does. You don't want to be stuck in a room with a person and his/her sideman very long.
Joseph: John and Steve were having a cuss fight, and after every cuss John made, that twat Declan would keep saying “innit".

Philip: That daft cunt is such a sideman.
by TheScouseAssassin June 09, 2013
 
4.
That one sucker that gives all his time and effort in to a girl that is just using him , even though they say they are in a relationship they do not ever get physical and if they do get physical she's either drunk ,or getting him to give her a Favour. She finds him weak and annoying and will often hook up with his much more appealing friends .
Bestfriend - Have you smashed yet

Sidemen -noooo ,but we went to the cinema last week and I paid , I love her soo much

Bestfriend - Are you ever going to smash ?

Sidemen - yeah ,but between the shopping sprees i finance and hours i put in doing her home work ,I'm happy just holding hands

Bestfriend - well just fyi ,tightest pussy around......

Sidemen - what ??......

Bestfriend- yeah............. awkward
by THeSunKiller November 19, 2013
 
5.
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.
by Pseudonym536 May 31, 2014
 
6.
Jordan Young. A Male Black Youth Searching For His True Identity By Being Affiliated With Other Youths Higher Of His Popularity. This Results In People Knowing Him As The Guy Thats "Always There" Or "A Tag Along" , Going To Meet People With Friends He Doesnt Even Know, Or Even Going To A Party He Is No Invited To. This My Friends, Is A SIDEMAN(Jordan Young)
"Naah that guy just bumlicks him, fucking sideman" "What? Like a Jordan Young? Surely he cant be Thatttt bad of a bumlick?"
by FrontMan1234 December 23, 2012
 
7.
A person that receives a blowjob at a white persons party however cannot remember the events that took place nor the person he received it from. Also turns up to parties uninvited.
That guy went shopping with a girl, the girl was texting her boyfriend whilst he was with her, then after he dropped her home he texted her 'LOVE YAx' and she didn't reply. What a sideman
by Someone special123456789 January 24, 2013