Short for "great minds, mother fucker". References the phrase "great minds think alike". Quotes Kevin Smith from "An Evening With Kevin Smith".
Short form used for situations in texting or instant messaging where both parties make the same point at the same time, before either can see the other's point.
12 step recovery jargon referring to someone new who talks about how great life is, now that they're sober. 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.