E Bump
When you bid on eBay just to mess with the price and make things expensive for everyone else, even if you end up paying for it yourself.
He bid $100 on a $5 pen just to annoy the seller and then got the pen and $100 back.
She bid $500 on a $20 hoodie just because she thought it was funny.
He bid $1,000 on a $10 book so the other people would be confused and mad.