Seen in a comment from a social networking site:
"Your alive ? I thought this was a line through a wishyboard...."
I wouldn't have understood what this meant without the context. But it's pretty clear that "wishyboard" is being used here instead of 'ouija board'. So we have the alteration/substitution necessary for an eggcorn. Do we have a reasonable semantic reanalysis?
It's a tough one. Is it likely that "wishy" refers to the divining, eking, asking, and pleading that might accompany a ouija board session? Is there wishing involved in the typical seance? Wishing upon a pentagram?
And beyond the possibility of a reanalysis here, this is nonce term with extra weight on the "once". I couldn't find any relevant hits in a quick search on Google™. This might be a true one-off. But there's just something about it…