obnoxious

Synonyms: abhorrent abominable annoying awful beastly big mouth detestable disagreeable disgusting dislikable displeasing foul gross hateable hateful heel horrid insufferable invidious loathsome mean nasty nauseating objectionable odious off-color ornery pain in the neck pesky pestiferous pill repellent reprehensible repugnant revolting rotten sickening stinking unpleasant

Antonyms: agreeable delightful kind likeable nice pleasant soft