someone who is gay and has a mumpy ass, they are typically also stupid and suck phat balls. And the balls that they suck are abnormally large. And they stick thier own pps in thier own mumpy asses. and call there butts bussies.
It is a design on the pavement located in the esplanade between Disneyland and Disney California Adventure. The design looks like a compass with Mickey Mouse heads in every corner. The word Mumpass is short for the words "Mickey Mouse compass."