It means big or fierce, it also is an accomplishment in a hearty manner, and over the top.
1.)"Wasn't that a redundant magnimous score??"
2.)"Last night was so crazy it was Magnimous, those kids were drunk on Absinthe"
3.)That man is so magnimous, he's like a giant...run.
by rawrlylecrocodile January 2, 2007
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