A phrase used to insinuate that one is not being productive or useful. Commonly used by New Yorkers as a joke. Can be used in a derogatory or joking manner.
Person 1: (not paying attention)
Person Z: "Whatta ya doin? Making soup?
His tongue-flicking and persistent sucking made her engorged clit stand out like an oyster in a delicious, fragrant, steaming cup of liquid. He was making oyster soup.