A survivor. Someone who takes things on no matter what. Doesn’t matter how hard it is they’ll always give it their best and just suck it up, just like sucking up nuts even though many will not do that.
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.