Wiktionary
n. (context US English) A raspberry (noise made to imitate flatulence).
Usage examples of "razzberry".
The creature made a mocking sound halfway between razzberry and caw, and launched itself at the lieutenant.
But Nellie squirmed at the thought of the big razzberry Smitty would give her when it was all over.
The demoralized, ramshackle little band in the empty ballroom ended a number with razzberries and squeals.
At Division Headquarters two miles in the rear, a liaison captain with the G3 section boldly concluded that it was just a ruse to get rear echelon soldiers to go to the front lines where they would be greeted by the raucous razzberries of the infantrymen and maybe an unfriendly sniper bullet or two.
Even speaking Anglic normally, fins usually sounded as if they were giving the listener a long series of razzberries.