the.com/hooray

means An exclamation of joy, approval, or triumph, shouted when something good happens.

from Likely a variant of 'huzzah,' an older cheer sailors and soldiers used, which itself may have started as a hoisting-and-hauling grunt before it became a shout of triumph. 'Hooray' and its cousin 'hurray' settled in as the everyday version, the one crowds and children reach for without thinking — nobody owns a patent on the exact moment it split off, it just did, the way cheers tend to evolve by repetition rather than decree.