Cybersquatter

Cybersquatters register domain names that are trademarked by someone else in order to sell it to them later. That's not nice, and it is illegal too. It's a pretty cool word though.

Jamais-vu

Jamais-vu is the opposite of deja-vu; it refers to the feeling that something very familar is actually very new. Sound familar? No? Maybe you're experiencing jamias-vu.