What does speaking IM mean?

"IM" in this context most likely stands for Instant Messaging.

Here's why:

* Common Usage: "IM" is a widely recognized abbreviation for instant messaging, which refers to real-time communication methods like chat applications (e.g., WhatsApp, Facebook Messenger, Telegram).

* Context: The phrase "speaking IM" implies a conversation taking place through an instant messaging platform.

For example:

* "I can't speak on the phone right now, but we can chat IM."

* "Let's speak IM later to discuss the project."

Note: It's also possible that "IM" could have another meaning in a specific context. If you provide more information about the situation, I can help you understand what it means.