When something that happens to slow down you're action. Similar to cock blocking, except that it pertains to everything, not just pussy. A speed bumper is your friend, but he likes to watch you have a hard time with what you do
My boy was speed bumping our good time by getting too drunk to drive and making us call a cab.
Speed bumps are suppose to make you go faster and make you fly high to the sky. The essential use would be to go faster on these especially on school zones.