Soup
Soup turns up in 2 fields: tribology, concrete. Here is what it means to the people in each one.
Soup in tribology
Grease that has broken down or been mixed with an incompatible type and turned runny.
Shop description of grease that has lost its consistency and flows like a thick liquid. The usual causes are mixing incompatible thickeners, heavy water contamination, long shear in a high-speed bearing or extreme heat. Soup leaks past seals, runs out of the housing and leaves the contacts starved, so finding it is a signal to purge the bearing and check what went into the gun.
"Pulled the end cap and it was pure soup in there, somebody pumped lithium into a polyurea motor."
Soup in concrete
Concrete so wet it runs like liquid, usually because too much water went into the truck.
Crew slang for a load with far more slump than its mix was designed for, typically from water added by the driver or demanded by the crew. Soupy concrete is easy to place but bleeds heavily, segregates, shrinks and cracks more and breaks weak, since every gallon raises the w/cm. Inspectors who hear the word on a structural pour start reading tickets for water added.
"Whoever told him to add 20 gallons made soup, that wall is going to show sand streaks and break low."