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.
Tyrone: Nah man, he took her shopping then she ducked.
Chris: Steven is a sideman bruv!
Philip: That daft cunt is such a sideman.
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