"Fiddlesticks!"

(Other definitions for pshaw that I've seen before include "Expression of impatience" , "scornful reaction" , "Contemptuous cry" , "Exclamation of impatience" , "it's disgusting" .)

(Other definitions for rats that I've seen before include "Heels" , "Treacherous rodents" , "Annoyed expression" , "Hamelin's pests" , "Mild oath - sewer residents" .)

(Other definitions for nuts that I've seen before include "Heads - fans - fruit" , "Beans" , "off one's trolley" , "deprived of one's wits" , "Edible seeds with hard shells" .)

(Other definitions for drat that I've seen before include "Minced oath" , "Blow!" , "Informal expression of annoyance" , "Expression of annoyance on DART" , "Curse it!" .)

(Other definitions for pooh that I've seen before include "ring round" , "Hoop around exclamation of disgust" , "A.A. Milne's lover of hunny (sic)" , "Milne's bear" , "that smells horrible" .)

(Other definitions for crud that I've seen before include "That's disgusting" , "Disgusting waste matter" , "radioactive waste" , "Unpleasant substance" , "worthless stuff" .)

(Other definitions for darn that I've seen before include "Mend by stitching - damn!" , "Mend (knitted material)" , "Mend with 17s - mild expletive" , "Sew" , "Repair (with needle)" .)

(Other definitions for bows that I've seen before include "Knots with two loops" , "foreparts" , "Acknowledges applause as actor does" , "some people play with" , "Bends, defers" .)

(Other definitions for heck that I've seen before include "Damn" , "grating!" .)

(Other definitions for poppycock that I've seen before include "Rot!" , "Scarlet flower on male bird? Nonsense" , "Balderdash" , "Red flower on rooster? That's nonsense" .)