Slang abbreviation of 既婚男性 (きこんだんせい). Used in casual online or conversational contexts, often with a slightly playful or dismissive tone.
See also: 既婚男性 (きこんだんせい)
I often see the word 'kidan' (married man) online.
He's already a married man, so he can't go out like he did when he was single.
Alternate spelling noted; less common.
Abbreviation of 既婚男性 (きこんだんせい), taking the first kanji of each word. The alternate spelling 気団 is a phonetic equivalent.