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

EOB
End Of Business

N2MU
not too much, you?

OED
Oxford English Dictionary

WYLABOCTGWTR
Would You Like A Bowl Of Cream To Go With That Remark