close friend, bosom buddy / crony, chum

手を出す: to take or put one's hand out; to try to participate in, to foray into, to try one's hand at; to attack.

出す: to take out, to show, to turn in, to publish, to send, to begin, to serve food

(Osaka, archaic or obsolete elsewhere) synonym of です (desu)

synonym of 駄津 (datsu, “needlefish”)

打診: sounding someone out, percussion

(chiefly women's speech) first person singular pronoun: I, me

private; mine

(polite) first-person singular pronoun: I, me

a personal or private matter / (by extension) selfishness