One who uses the
merge lane as an actual,
viable, legal lane of traffic, for the purpose of a) getting into a static lane of traffic far in advance of the other vehicles who have
merged more promptly, or b) passing moving traffic at greater speeds than even the current 'fast lane' would allow.
Al was in the habit of only half-occupying a lane when he
merged into it, leaving half his 1990
Dodge Dart hanging into the merge lane to
discourage the Merge Burgler s.