whoa UK /wəʊ/US /woʊ/exclamation 3verb 1forms 3 exclamation3 •stop, slow down or calm down, used as an order to a horse or a personWhoa, Nelly! •An expression of surprise.Whoa, are you serious? •Used as a meaningless filler in song lyrics.I am the type who is liable to snipe you With two seconds left to go, whoa. — 2003 verb1 •To attempt to slow (an animal) by crying "whoa".He was whoaing the horses loudly, and they did seem to be going faster than usual—in fact, they were galloping. — 1926 formswhoaed · whoaing · whoas