兄ちゃん

Etymology 1
Of, a childish variant of the honorific.

Noun

 * 1)  (one's own) elder brother
 * 2)  boy; lad; chap
 * 1)  boy; lad; chap

Etymology 2
Of, with sound shift from ani to an.

Noun

 * 1)  (one's own) older brother
 * 2)  a young man, boy, lad
 * 3)  a playboy, a libertine young man
 * 4)  son; eldest son
 * 5)  (one's own) husband
 * 1)  (one's own) husband