Third-person singular simple present indicative form of hooray.(verb)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "hoorays" in a sentence
"As he dashed through the streets in his triumphal car, he hated Hickney Heath, hated the wild "hoorays" of waggon-loads of his supporters on their way to the polls, hated the smug smiles of his committee-men at polling stations."
"The lad rushed off, followed by Joses, who seemed quite as much excited and as overjoyed, for he kept on slapping Bart upon the shoulder, and giving vent to little "hoorays" and "whoops", and other inhuman cries, indicative of his delight; while no sooner did the Beaver realise that"
"Thousands of bloggers have shouted their virtual 'hoorays' to their grandmothers."