A derogatory term for those of Indian descent (not native American.) It comes from their accent and speech pattern. Try saying "bumpidy bumpidy" with a Hindu accent to understand why the word is used to describe these people. Synonms include brownie, furry curry, and elephant jockie.
The bumpidy bumpidy at 7-Eleven made the store smell like curry.
On the IMDB forums, the act of posting a blank response and then deleting it a second later thus intentively bumping the targetted thread and remaining anonymous as the bumper.
Specifically detested because it is a stealth form of necroposting and often used by trolls.
boxOmetal: some idiot just revived that y2k thread
cardboardboy: yes, well done idiot boxOmetal: wtf?
cardboardboy: saw your name on the most recent post before it was deleted you shadow-bumping idiot