pain in the ass

Noun (1)

1. something or someone that causes trouble; a source of unhappiness“a bit of a bother”“he's not a friend, he's an infliction”“washing dishes was a pain in the neck before we got a dish washer”Synonyms: annoyancebotherbotherationpaininflictionpain in the necknuisanceType of negative stimulusKinds nuisance, irritant, plague