An odd coincidence that is extra out of the ordinary. An occurrence that would probably happen only once in someone's lifetime.
Person 1: I haven't heard that song in forever!
*Turns on radio, and the song is playing*
Person 2: OMG, that's a blik!
Storyteller: Someone called asking for my girlfriend Sarah when she was at my house, and they wanted to know how to work the Wii on the TV. Turns out they had the wrong number, but what a coincidence that they called for a "Sarah" when she was hanging out at my house, and that they had the same Wii and TV set up!
Everyone else: That's a blik!