OTW means “on the way.” It’s common in texts and chats when someone is heading to a place and wants to say they’re coming soon.

Example

  • “I’m OTW now” = “I’m on the way now.”

Other possible meaning

  • In some contexts, OTW can also mean “off to work,” but that use is less common.

TL;DR: OTW usually means on the way.