What does FAT mean?
File Allocation Table
Other definitions of FAT:
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How to use the term FAT:
There are no example uses of FAT at this time. We would greatly appreciate your contribution if you would like to submit your own!
More slang terms:

LIMH
laugh in my head

OO
OpenOffice

2M2M
Too many too mention

FIXIN TO
About to, getting ready to