Also found in: Acronyms.
slang An initialism of "good to know," with "to" represented by the number "2." Used especially in online communications. A: "Just make sure you disconnect the mains before you open up the socket, or you could be in for quite a shock." B: "Thanks, G2K."
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.