Pronunciation: pee-pee-doom-doom. Context: Sounds of the nagaswaram & mridangam played in unison in a tamilian marriage. Usage: I couldn't hear the plastic pleasantries uttered by the groom as it was drowned by the pipi dumdum.
Pronunciation: Moor-mur Context: When something is crisp, it makes a 'mur-mur' sound in your mouth. Aside: In the Western Indian state of Maharashtra, puffed rice is referred to by some people as 'mur-mura'. It figures.