Cybersquatting
Quick answer
Registering a domain containing someone else's trademark in bad faith — to sell it back, divert traffic, or enable fraud.
Cybersquatting is the umbrella over typosquatting and brand-name domains. Remedies include UDRP arbitration, URS suspension, registrar abuse complaints, and (in the U.S.) ACPA lawsuits with statutory damages up to $100,000 per domain.