Not aftertiming, but still........

Obviously aftertiming is claiming a winning bet way after the event, but what's the phrase for claiming a big price way before the event.

I've bet a couple of horses on here at massive prices, and I know I was the only one to get the prices, having checked the traded column, but hasn't stopped a couple claiming to get the odds too, both times claiming just to be on for a couple of quid. One of the horses, fwiw, already withdrawn. Won't name names, as I actually like the forumites, but just what is the correct term for this kind of behaviour.