To announce something by yelling it in an exaggerated manner. Often used in anime and manga for comedic purposes.
To yell-nounce
Yell-nouncing
yell-nounced.
Tamaki just yell-nounced that Haruhi is adorable.... again.
yell-nouncing his lecherous intents was a surfire way to get smacked upside the head. Lols all around.