Top Definition
Something that is really large or oversized in some way.
"That is one MacGuaff computer Rob has, he installed 24 gigabytes of RAM".

"That is a MacGuaff can of bean salad that you bought from the wholesaler today, looks like it was meant for catering, it's somewhere in the region of 10 litres."
by cititracker April 30, 2010

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