Of a person: To make this sound as an expression of disapproval or derision. (Usually const. at, with indirect passive.)

intransitive. To blow one's breath out abruptly as an expression of contempt or scorn; to exclaim ‘pooh!’ or the like; to speak or behave scornfully…

intransitive. To make a dismissive or contemptuous sound with the lips. Cf. pooh, v.

To make a contemptuous puffing gesture with the lips, to puff in scorn, to ‘pooh’. Obsolete. intransitive. Also with indirect passive to be blurted at…

intransitive. To exclaim ‘pooh!’

intransitive. To say ‘pshaw!’ (as an expression of impatience or disgust). Frequently with at.

Of persons. To express contempt or indignation by a snorting sound.

Used as a verb

intransitive and transitive. To emit a short sharp puff of air, breath, etc. Cf. poof, int. n.2 rare.