What is Macrowave?
1.
Device similar to the microwave which uses MACROwaves to cool food items.
Hey marsh, can you please put my soda in the macrowave for 30 seconds to make it a bit colder.
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2.
A macintosh computer that will cook itself after realising it's not running windows OS.
Guy 1: hey isn't that your computer steaming?
Guy 2: nah, it's a macrowave.
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3.
a really big microwave (typically industrial, or just large due to it's age)
"takes about 20 minutes to cook a hotdog in that macrowave"