When you are having vaginal intercourse with a girl in the standing doggy position with her leaning against a wall, the penis is removed and thrust into her anal orifice, thus causing her to attempt to 'run' up the wall like a gecko
A nickname for a shirt with a contrasting collar and cuffs, usually a blue shirt with white collar and white cuffs. Lee Iacocca started this fashion trend back in the 80's. This nickname developed as a result of the character Gordan Gecko wearing these types of shirt in the movie Wall Street. These shirts seem to phase in and out of style every few years.