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1.
something all the drivers who travel at a speed of 20 MPH like to drive in, effectivly impeding the travel of people who know how to drive
Some stupid fuck is doing 20 fucking MPH in the fucking left lane!!! Jimmy, open the fucking glovebox...
by Jog DMC December 08, 2003
 
2.
The traffic lane occupied by all inconsiderate slobs, cell-phone-yapping soccer moms, arrogant yuppies, and natives of Colorado.
All cars with Colorado license plates will be found in the left lane.
by Cap'n Bullmoose April 30, 2005