An instance of saying "pooh".
"He let out a pooh when he saw the mud splattered on his shoes."
In plain English: Pooh is an old-fashioned word for something that is silly, foolish, or not worth taking seriously.
"The old man used his walking stick to pooh at anyone who stepped on his garden path."
To say "pooh".
"The child would pooh at his toys whenever he was told to clean up."
Expressing dismissal, contempt, impatience, etc.
"He pooh-poohed her concerns as completely unfounded."
Short for Winnie the Pooh.
"Most children who watch that cartoon show him as a friendly bear named Pooh."
Originally onomatopoeic ("perhaps ancient" according to Online Etymology Dictionary) for a puff of air, after earlier poh and similar to later pew, phew, pho, phoo, poof. Later influenced by poop, onomatopoeic for the sound of flatulating and defecating, and by interjections of disgust similar to phew, pee-ew. Interjection for an unpleasant smell possibly linked to French puer ("to stink").