The sound made when you have done something worth a celebration but you don't have the energy or funds to throw a party at that moment so you settle with a simple sound.
Ted: Hey guys I got back from the bar this morning and still had some money left! TA DA!
Ninja: Thats great Ted...just great but what about your dignity?
Midget Ninja: Ya dude...I had no idea you could make an X-ray with a lamp, a light socket, a camera and the anus.
Exclamation used on revealing a surprise or on completion of a hard task. Often accompanied with jazz hands pose.
alice shouted "ta da" as she finished her complicated dance routine