Mleanutbutter is the "spread" created by the heat and energy of two forces rubbing together. It’s a pretty funny way to describe the aftermath of a high-energy interaction!
In the world of physics, friction usually just gives you heat or worn-down parts, but meanutbutter sounds like a much more creative (and slightly messy) result.
"After a long night of intensefriction and close contact, the sheets were a tangled mess, practically coated in meanutbutter."
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.