The act of inserting a small animal, usually a small rodent, up ones anus for sexual gratification. The reference to Richard Gear relates back to stories in the 1990s that Richard Gear had been admitted to hospital and needed to have a mole removed from his back passage. The act was thereafter named Richard's gear.
Grandad can I borrowing this pipe, I have been experimenting with Richard's Gear, I need something to connect my arse cavern to Chucky the hamsters rotastack.
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.