Best definition
The level of belligerence achieved by adding one beer to the end of a night of drinking shots / mixed

drinks. Generally nights when you zchoam involve some sort of wacky story and your level of drunk is easily remembered years down the road. Derived from the word zoom.

James: “I was drinkin vodka tonics all night but after I drank that random beer you handed me, I was really zchoam.”

Joe: “Yeah all of a sudden you were out of your mind. You asked the coat check girl how much it would cost to purchase all the coats she had, then you ended up in a back alley toolshed with a random girl”