Definition
Used to announce a successful solution to a problem.
How People Actually Use It
A quote, from the anime , serial experiments lain (YOU SHOULD WATCH IT!!) she is lain. We are. Lain LAIN LETS ALL LOVE LAIN!!
"But then, where is the real me, after all is said and done? Oh, there is no real me. I guess that's it. I only exist inside of those people aware of my existence."
Source: Urban Dictionary