Not sure if it’s supposed to reply to your comment or what, but smurfing is when a skilled player makes a new account specifically to play against low skilled players and absolutely demolish them.

See also: twinks. Players in Dark Souls who run as a low level character to get powerful weapons much later in the game, either by using shortcuts or just skillfully defeating bosses at a low level to access the sections of the game containing the weapons. These weapons can only be upgraded with a rare resource called twinkling titanite (hence twink) which they also get, then come back and invade low level players who don’t stand a chance.