Willie leaned over and whispered that Winnie the pooh had the hots for me.
Or perhaps name it after pooh himself, with his quizzical faith in human (animal) nature?
1590s, "a 'vocal gesture' expressing the action of puffing anything away" [OED], first attested in Hamlet Act I, Scene III, where Polonius addresses Ophelia with, "Affection! pooh! you speak like a green girl, / Unsifted in such perilous circumstance. / Do you believe his tenders, as you call them?" But the "vocal gesture" is perhaps ancient.
A mild exclamation of disbelief, dismay, disappointment, etc: Oh poo, I dropped it (1602+)noun