Top definition
The feeling of a full stomach with little or no substantial nutrition within ones stomach subsequent to eating a large McDonalds meal.
Feeling McGroggy is closely followed by McCramps and the infamous McShit.
'Man, I feel McGroggy.'
'That Big Mac made me McGroggy.'
'I felt so McGroggy until I took a huge McShit, then I felt loads better.'
by Tom Parfitt April 10, 2008
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