A third imposter is a person who acts like an imposter in the game among us while he is an innocent crewmate and gets every other innocents killed
Oh look a confirmed crewmate who scanned
D4 being third imposter: omg that person is an imposter I saw him vent I swear

*Innocent confirmed crewmate gets thrown out the ship*
by The Funny Guy 69 December 23, 2020
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Ninja is the third imposter.

Example: "It's Pokimane, and Valkyrae! 1 Million Percent!!" (Not Them) "Thanks for being the third imposter Ninja!"
by LAMOW October 23, 2020
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