An emote with its roots from Twitch streamer Mychal "Trihex" Jefferson. Used as a way to greet someone appearing on a livestream or to mark that a livestreamer is "trying too hard". It started to gain its huge spread through Twitch streamer Ice Poseidon. The 7 resembles a salute. Due to a coincidence on an Heartstone stream, the Trihard 7 is often missunderstood as a racist emote.
by SheldonSTA September 23, 2018