Top Definition
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
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
coincidence, (or if said under one's breath)... a Suspiciously Unusual Coincidence.

Street slang by barely literate Irish, Jewish, German, Italian and Chinese street toughs (such as the Pug Uglies , Black Hand, Purple Gang and Tong Hatchet Men) from NY's ethnic ghettos of the 19th Century, specifically, the Lower East Side, Five Points, China Town (Manhattan), and Flatbush, Empire, Coney Island (Brooklyn)... later evolved into nationally used street slang by early 30s talkie gangster /prison movies and then into the common vernacular by such comedians as The Three Stooges' and 'The Marx Brothers'.
Q. Hey, Charlie... you got snake eyes?

Roll...

A. WOW... I got boxcars... what a coinkydink!...

Q. Coinkydink my friggin ass... them dice is loaded -ya prick...!!!
by Ye Old Master April 29, 2015
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
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