Sus is used to describe someone who is suspected of being gay.

Intelligence agency term for "psychological operation". A government or corporate-sponsored operation, usually taking the form of a "terrorist attack" or "crazed gunman on a spree", with the intent of panicking the public into demanding more police and laws inhibiting freedom. Psyops are usually carried out by drugging a civilian or group of civilians with aggression-promoting drugs, psyching them up, arming them, and sending them out to commit mayhem. Government-sponsored terrorism. See also blackshirts, conspiracy

Sus boi (aka notclumsyLTN) is an Irish ‘human’ who is best known for being randomthiNgs sidekick

A “straight” person (usually male) who engages in suspiciously gay activities.

Usually in such a way that arouses suspicion and doubt regarding their sexuality around their peers.