Off-white substance created when cheese is boiled. Derivative of "cheese scum", it lacks flavour but takes on myriad other useful properties usually lacking in regular cheese.
"I can't believe you ate that cheem, you sick weirdo"
"I had a puncture this morning but fortunately I was able to patch the hole with a nice wad of cheem"
"Deep-pan, flame grilled, no anchovies, extra cheem. And make it quick this time, pedro"