difficult person; good-for-nothing; pain in the neck
Refers to a person who is troublesome, hard to deal with, or a nuisance. Often used in exasperation. The gloss 'pain in the ass' is vulgar; 'pain in the neck' is a milder equivalent.
He's really a difficult person.
I'm at my wits' end with that good-for-nothing.
Standard kanji-kana spelling.
Hiragana spelling for 人; common in casual writing.
Hiragana spelling for 困った; used for emphasis or in informal contexts.
From the past tense of 困る (to be troubled) + 人 (person), literally 'a person who has become troubled' or 'a troubling person'.