An old America Online term. If one were to act up in chat room, a moderator could TOS you. It was similar to a kick, except AOL would disconnect, and every member on your account was notified with an e-mail. Multiple TOSes could result in losing your AOL account.

TOS means "Terms of Service". When users get too rowdy
some people report them to their Internet Service Provider
(a.k.a. ISP) or hosting service and if the user gets their account canceled,
people say they were TOSed.

Internet slang, meaning kicked off of a website for violating its Terms of Service.

Internet slang, meaning kicked off of a website for violating its Terms of Service.