it means keep up with the car in front of you when the light turns green ("the wave")...if there's too big of a gap between cars, the light changes, leaving those poor souls behind to wait through another traffic cycle...so, in consideration for the chaps behind you, "Mind the Gap" between you and the car ahead of you when the light turns green!
If you don't 'mind the gap' between you and the car ahead, you'll tell the traffic light that no more cars are coming and the light will turn red, therefore causing the cars behind you to wait for another traffic light cycle.
by Snappyhead March 6, 2015
Get the Mind the Gapmug. Its the part in a girl's(or a guy with longer hair)hair when she has layers in the front and bangs, the layers grow out and she keeps the bangs trimmed... it then leaves an odd gap.
When your hair grows out and then there is this odd gap between where your layers start and your bangs begin. This is usually the time to stop trimming your hair your self and get a professional to even everything up. No body wants an odd gap =Z
by Philm_girl April 10, 2011
Get the Odd Gapmug. While she was blowing me, she put one finger under and tickled spiffkins gap, before going back to my balls.
by Bluebrees September 13, 2008
Get the spiffkins gapmug. Mind the gap refers to avoiding girls with large thigh gaps, I.e. Sexy girls, instead going out with intellectuals.
by Second half February 25, 2015
Get the Mind the gapmug. Someone who is a little too 'long in the tooth' (old) to be shopping @ the Gap for semi-formal wear.
by P3 PETEEY October 5, 2010
Get the GAP-TOOTHmug. by Chris Picciotto June 5, 2004
Get the happy gapmug. by Ldheksnbe January 20, 2019
Get the Thigh Gapmug.