interj. [ Of. imitative origin; cf. Icel. pū. ] Pshaw! pish! nonsense! -- an expression of scorn, dislike, or contempt. [ 1913 Webster ]
v. t. To make light of; to treat with derision or contempt, as if by saying pooh! pooh! [ Colloq. ] Thackeray. [ 1913 Webster ]