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

BOOKMARK
Tagging someone or something to keep it in place for later, when you're ready for them/it.

WOW
Wish Only Well

ME2
Me too
ILMS
I love my self