Hindsight Premonitions

The act of stating that you had a premonition of something that had happened in the past, however, the first time that you have told anybody about the premonition was afterwards, rendering it questionable and useless. Coined by Hamish & Andy.

Hamish: Oh my god, I had a dream last night that that horse would win.

Andy: Uhhh, you're not magic; you can't get Hindsight Premonitions.