eBay sniper
Those lazy bums who sit on their butts all day watching eBay auctions and then bid the very last second just to mess with your head.
I was about to win, and this sniper showed up and bid the last second and I cried.
This sniper bid on my auction at 11:59 PM and I had to take a nap and then wake up to lose.
I was winning, and some sniper logged in from their phone in the middle of the night and sniped me.