Ghost ban

Literally ignore someone in a chat.

Dood 1: Did you guys do the homeworks?
Dood 2: The new update of this game is soo cool!
Dood 3: You are absolutely right !
Dood 1: WTF ok I'm officialy ghost banned

Ghost Ban

A ghost ban (N) is when a social media platform mutes a user's account, but allows them to continue interacting as if others could see their content.

Why are you posting? You were ghost banned 3 months ago!