Some faggot on Call of Duty: Modern Warfare 2 that always rush, plant/defuse the bomb or basically, the opposite of what you want them to do. They bitch and whine about whatever things kill them and are usually 12-year old kids.
Green kids are that sixth player on your team that's not in your party, and therefore is green on the minimap and liable to suck.
FUCK YOU MOTHERFUCKING GREEN KID YOU GOT ME KILLED
Oh my god did you see that fucking green kid rush plant the bomb?
"Hey go get the bomb" FUCK DUDE THE GREEN KID GOT IT