Drop a line意思

"Drop a line" is an English idiom that means to write a brief message or letter, usually to someone you haven't contacted in a while. It implies a casual, friendly communication, often used between people who are not in regular contact but would like to maintain a connection. Here's an example of how it might be used in a conversation:

Person A: "I haven't heard from you in ages! How's life been treating you?" Person B: "Oh, I've been busy with work and family. But I really should drop you a line and catch up. It's been too long!"

In this context, "drop a line" means that Person B intends to write a short letter or email to Person A to update them on their life and renew their friendship.