When the Anus of a man is rapidly filled with other mens bodily fluids (cum,squirt juice,spit, or a combination) then the receiving man proceeds to tightly clench his arse cheeks together and shake his body, effectively smelting the fluids inside of his arse.
“Hey Ronan, did you see johnnys nephew got an ardoyne smelter!”
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.