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The deep regret you feel within your bowels after having engorged yourself on a late night McDonalds combo meal.
I definitely should not have eaten that Big Mac just now. I got a case of the McGrets.
by splixx December 26, 2009
The feeling you have a couple of hours after eating a greasy fast-food meal.
Rogan had mid-afternoon McGret after consuming two cheeseburgers and fries for lunch.
by hillsburgh_hillbilly June 18, 2009
The feeling you get after eating McDonalds.
I McGrets having that quarter pounder with cheese. I feel like i'm going to throw up.
by altruisticaussie March 10, 2009