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 1, 2012
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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 9, 2013
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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
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An idiot or jack ass. (Mostly an English colloqualism)
Person 1: Oh look at him, he's a sideman
by My pseudonym is 'Poop' May 22, 2015
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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
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A person who will follow someone then snake them later also called a sidedish or follower
Hes such a sideman
by ya boi skinny dip January 22, 2018
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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
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