Ohhh wait the question was "what's one short word best expressing disgust". I thought it was "what's one short word that disgusts you" lol jk jk
I would say if it's a sound effect word (so onomatopoeia) then "AUGH" or "YEEK!" or a classic JonTron style "ECHH" would work perfectly. Otherwise if it's an adjective, then you can't deny that Adam Ellis' technique is the way to go.