† pooh-poohistn.Obsolete = pooh-poohern.Apparently an isolated use.
ΘΚΠ
the mind > attention and judgement > contempt > [noun] > contemptuous person > one who expresses contempt vocally
pooh-pooher1841
pooh-poohist1861
pooh pooh1867
pisher1901
1861 W. H. W[hite] in Rec. Astro-meteorol. Soc. No. i. 13 I mean the Pooh-poohists. These objectors..rear high their crests on the announcement of any novelty in practical science.