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Noun: pain in the ass
Usage: N. Amer, vulgar (elsewhere: pain in the arse)
  1. Something or someone that causes annoyance, inconvenience, or makes life more difficult
    "a bit of a pain in the ass";
    - annoyance, bother, botheration, pain, infliction, pain in the neck, nuisance, irritation

Type of: negative stimulus

Encyclopedia: Pain in the ass