a sound that people make to show that they are hot, tired, or happy that something bad has finished or did not happen Phew, it's hot in here! Phew, I'm glad that's all over. compare whew More Like This Exclamations aargh, ah, aha, ahchoo, ahem, aw, bah, boo, coo, d’oh, eek, eh, er, eww, gee, ha, hey, ho ho, ho-hum, hooray, huh, mm, oh, oho, oi, ooh, oops, ouch, ow, oy, pah, phew, psst, sh, tsk tsk, tut, ugh, uh, uh-uh, uh-oh, um, whoopee, whoops, woo hoo, wow, yay, yippee, yuck, yumSee worksheet. Word Origin early 17th cent.: imitative of puffing.