if particularly band-nerdy, it means the part in a song (usually march) in which the tubas take the down-beat and the horns take the up-beat, thus creating an OOMPA SOUND
(and as a result, the ham song is born)
"don't touch the chocolate river!!!"
band director- "cmon horns,i need that oompa effect!!!!"
2. A Signing creature from the Philippines and CA that likes to run and eat vast quantities of food
3. Short, Bronzy skinned and dark haired
He is from Oompa-land that is so RAD