Idiom of the day :- Drop a line

Usage, examples and definition of the Idiom :-

Here’s a riddle: when does drop mean ‘to write’ and a line mean ‘a letter’? Answer : when it is used in the expression drop a line. ‘Dear Liz,’ the letter began. ‘I thought I would sit down and drop you a line. Now that I have, when are you going to drop me a line ?’