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1.
A coincidence, usually used in a gay sense, but will make someone laugh.
You got some booty last night too? What a coinkydink!!
by Swing May 11, 2004
 
2.
abrev for what a co-incidence
hey, yo, what a co-inky-dink!
by totallyours January 28, 2005
 
3.
Coincidence: a striking occurrence of two or more events at one time apparently by mere chance.
Laymullet: "I need you to work on your loss reports."
Maureen: "What a co-inkydink, that's exactly what I'm doing now. Thanks for your concern".
by krischicki June 12, 2008
 
4.
a coincidence
the fact that gossip girl and i had the same ideas make it a coinky dink
by aduster June 21, 2010
 
5.
When one coincidentally gets a 'hard on' during a sexual experience, but said hard on is not caused by the sexual experience.
Coinkydinks are often associated with the use of Viagara.
by Nousvoulonstevoire February 13, 2010