drop someone a line

Verb

 * 1)  Write and send (someone) a note or telegram.
 * If you get a chance, drop me a line when you arrive in Cairo.

Translations

 * Finnish: ottaa yhteyttä,
 * Irish: cúpla líne a chur chuig duine, cúpla líne a scríobh chuig duine
 * Korean: