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

PMFBR
Pardon Me For Being Rude

NH
nice hand

FUBU
Fouled Up Beyond Use

8*
Kiss