When you check yourself out in front of the mirror at the gym after you've only done a couple sets.
Named after that one person named Aaron we all know who dishes out workout advice and claims to go to gym everyday but is in no way in shape.
Thus you just assume he just goes to the gym to lift once or twice and then spend the rest of the time flexing and admiring his non-existent muscles in the mirror.
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.