"Wasn't that fantastic?!"

• Self-satisfied exclamation
• "I'm finally done!"
• "Hey, look what I did!"
• Magician's fanfare word
• Words of accomplishment sung with upturned palms
• "Et voilГ !"
• "And heeeere it is!"
• "Amazing, right?"
• "Wasn't I amazing?!"

Wiktionary Word definitions in Wiktionary
interj. (alternative spelling of ta-da English)