What is Good longtime?

Original line is " me love you long time" from the Stanley Kubrick film Full Metal Jacket.

Has evolved over the years but is usually used as a form of acknowledgment instead of saying excellent or cool.

"Hey bro whats going on wanna chill?"

"Good longtime"

Can also denote the quality of something and longtime vice versa.

A Ferrari is good longtime but a holden Commodore is longtime.