What is bingo in spelling bee?

Bingo is a term used in spelling bees to describe when a speller correctly spells the word on their turn to spell without being prompted by the judge to do so. If a speller spells a word correctly on their first attempt without any error, it is considered a "bingo." This is a signal to the judge that the speller is confident in their spelling and does not require any further assistance. It is considered a highly desirable achievement in spelling bees to spell a word correctly on the first try and without any hesitation.