1) American rock music group 2) Annoying blowhard 3) Bad hat 4) Blabberer 5) Blusterer 6) Ear-splitting yakker 7) Indiscreet type 8) Mischief-maker 9) Noisemaker of sorts 10) Obnoxious talker 11) One who should be tongue-tied 12) Trouble maker 13) Troublemaker 14) Troubler 15) Vociferous sort Found on https://www.crosswordclues.com/clue/loudmouth