(n) A coincidence. Observing that things are oddly synchronizing. May be used as a false exclamation of wonder, to suggest that one ought to take a closer look at the obvious. Or used to annoy others by applying for no apparent reason. Example: Coinkydink!
COINKYDINK
Meaning of COINKYDINK in English
Slang English vocab. Английский сленговый словарь. 2012