/SLASHPLAY
How to kick a player in TF2
Type kick "Some Player" in the server console to remove that player. They can rejoin right away, so use banid to keep them out.
kick
Removes a player from the server by name. They can rejoin right away.
kick <name> Examples
kick "Some Player" Kick by name.
Arguments
nameRequired- Player name. Use quotes if it has spaces.
What it does
The player can rejoin right away. Use kickid if the name is hard to type, and banid to keep someone out.
The game's own description: Kick a player by name.
Run it on your server
On a SLASHPLAY server, type it in the Console tab of the server page; the reply shows right under it. A value set there lasts until the server restarts. To keep it, add the line to tf/cfg/server.cfg. New to this? Start a TF2 server first.
Your own
TF2 server.
From $0.03 an hour, only while it runs. New accounts get 6 free tokens.