an idiot who bids at the start of an auction, rather than waiting till the final moments, thereby driving up the price for everyone.
an item is on ebay with a start of one pound, a couple of people start bidding against each other from the start and drive the price up to £100 when there's still 6 days to go. The item would have sold for around that anyway but these two have made it not worthwhile for me to bid. These people are bidiots ... bid-idiots!
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