1) Blew chunks 2) Bombed 3) Caused some nose-pinching 4) Cleared the room 5) Did really poorly 6) Offended the senses 7) Performed really badly 8) Played badly 9) Played really poorly 10) Reeked 11) Reeked to high heaven 12) Smelled to high heaven 13) Was atrocious 14) Was awful 15) Was awful at the Improv Found on https://www.crosswordclues.com/clue/stunk