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1.
To bother or annoy someone or something
"Man these exams have been magging on me all day!"
by MagginAndHustlinAllDayErday December 21, 2009
 
2.
something that bothers or annoys someone else. To frustrate someone
"That teacher has been magging on me all year long."
by HustlingErday December 21, 2009
 
3.
1. Vomiting (see magged
2. Screwing something up
I'd carry him home, but he's too busy magging in the toilet
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Man, I just magged that test!
by Anonymous May 18, 2003