Derrogatory term used to describe someone with an extremely slow trigger finger. Usually winds up with 0 kills in an extremely easy team swat game.
"Don't be such a Mcswain, pull the trigger"
"Man did you pull a Mcswain that game"
"That cockbags such a Mcswain"
"Man did you pull a Mcswain that game"
"That cockbags such a Mcswain"
by Demos16 October 25, 2006