(Dublinslang, specific variant) to work in a sloppy way so as to be excused from unpleasant or unwelcome chores.
Joe said he was going to act the maggot, dropping tools and laying the beams out of whack, so the foreman wouldn't make him do over-time on the day of the semi-finals.
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.