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2.
a command to be provided with more of something
"Yo Killa D, hook me up fat with some of that sweet potato pie!"

or

-"Would you like to try some of the pea soup that I prepared?"
-"Yeah, hook me up fat."
by E Lo 11 March 20, 2008
 
1.
When, in a business transaction, someone hooks you up fat, they give you more than you expect.
Every time I go to McDonalds, they hook me up fat with a free soda.
by MrNimon July 25, 2011