phoo
/fuː/(also phooh, phooo)
exclamation
1Expressing contemptuous rejection, cursory dismissal (of a proposition, idea, etc.), disagreement, or reproach.
2Expressing discomfort, disgust, weariness, or relief.
Origin
Late 17th century; earliest use found in George Villiers (1628–1687), politician and wit. Imitative.