drop a line
Correspond, write a short letter or note. For example, I hope you'll drop me a line soon. This idiom uses line in the sense of “a few words in writing,” a usage first recorded in 1647.
Words nearby drop a line
droopy, drop, drop a bombshell, drop a brick, drop a dime, drop a line, drop arch, drop away, drop back, drop bear, drop behind
The American Heritage® Idioms Dictionary
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