drop someone a line

drop (one) a line

To contact someone, usually with a letter, note, or phone call. I know you'll be busy enjoying yourself, but please, drop me a line on your trip. I'll drop you a line once I get settled in at school.
See also: drop, line
Farlex Dictionary of Idioms.

drop someone a line

send someone a note or letter in a casual manner.
See also: drop, line, someone
Farlex Partner Idioms Dictionary
See also:
  • drop somebody a line/note
  • drop (one) a line
  • drop a line
  • drop a line and drop a few lines; drop a note
  • drop (one) a few lines
  • help (oneself) to
  • help to
  • keep (oneself) to (oneself)
  • keep to
  • keep yourself to yourself