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1.
the indiscreet word for sexual intercourse (same meaning as boink, but to be even slyer you say coink)
i want to coink that girl
by Mr.Mint November 19, 2009
 
2.
Coink - is a cow merged with a pig.
Oh my god! Look at her, she is such a coink!

She is a such a cow c but oinks oink like a pig!
by Arabella Cullen July 14, 2011