"Go Fuck Ten Other Women". Advice normally given to a single man obsessed with either ONE particular woman (one-itis) or whom is thinking of "getting serious" with his girlfriend.
A: Man, Betty is just perfect. I could fall into her eyes and never look back.
B: Dude, GFTOW. I mean it. You will regret it if you don't.
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.