1: The sound a crinkletush makes when they flop on their padded rear. 2: The act of falling on your bum while wearing a diaper. 3: A made up sound effect that Harzy created when thinking of a title for a submission that just so happens to sound cute.
Example: Aw, look at that sergal! He ker'flumph'd on his crinkly tush! What a cutie! <3