interjection
pooh
POO/puː/
An exclamation expressing dismissal or disgust.
Pooh, she exclaims as she waves away the spoiled food.

Etymology
The exclamation acts like puffing something away: a physical gesture of rejection becomes an expression of dislike, scorn, or contempt.
In context
Affection! pooh! you speak like a green girl, Unsifted in such perilous circumstance.