A person who impedes the flow of traffic by staying in the left lane. This person is either driving slower than everybody on the road, driving the same speed as the person to their right, or simply driving 1 mph faster than the person to their right. In all cases, they are ignoring the responsibility that comes with driving in the "hammer lane".
Driver drives in left left despite seeing the long line of cars behind them but refuses to move over to the slow lane because it isn't safe to change lanes while talking on the cellphone. This driver is a Left Lane Loser.
by Spammag June 18, 2009
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Refers to the idiots who instantly merge into the fast lane as soon as they get on the highway. They proceede to drive under the speed limit as to piss off the people who want to go faster then them as if they will win a trophy for slowing down as many people as they possibly can. When the oportunity comes to merge into the middle lane they "sit" and wait till the person behind them trys to pass and then move over just to get in front of them again, sometimes causing accidents and making a lot of people mad.
Damn, Im late for work and it seems as if everyone is a left lane sitter today.
by j2shea July 10, 2011
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Synonym of passing.

A person with mix of white and black races and passes for white only.
Guy 1: Joe Blow is riding in the left lane.

Guy 2: I didn't know Joe Blow was part black.
by MaxJohnson415 April 27, 2017
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Anybody with a Pennsylvania license plate. They're always the ones going 55mph in the left lane, with the right lanes completely damn clear.
"I nearly rear ended this asshole who was going 55mph in the left lane!"

"Gotta hate them left lane dicks..."
by Sir E. Braum February 19, 2009
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1.The guarding or protecting of the left lane on an interstate using an unreasonably small following distance.

2. Preventing other motorists from entering the fast lane when the situation arises.
There were at least 3 cars in front of me with their left blinker on during stop and go traffic on the highway. However, they could not shift over while I had my left lane defense up.
by RAD_revolution July 24, 2010
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An inconsiderate person who drives in the left lane and won't move over to let anyone pass.
Chris had thirty cars waiting to get by, but he would not get over because he was a Left Lane Marauder.
by CSH79 April 9, 2011
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a condition on limited-access high-capacity arterial roadways aka freeways where a disproportionately large convoy of vehicles occupies the "number one" aka left-most lane in anticipation of passing sauntering traffic in the other lanes. The cause of the build-up is often a beltway bitch or a motorist who is passing other slower motorists at a marginally higher velocity, often less than 1 mph greater, often out of fear that s/he may be pulled over for speeding if s/he goes any faster. Warning: this condition often creates freeway fags.
This left lane lag is ridiculous. That Buick needs to move over and let us pass!
by Driving School April 8, 2009
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