Glub what

Now Sid had fallen out of the boat and was finding it difficult to keep afloat. "Glub, glub," he glubbed.
"Stop glubbing Sid," said Arthur, "you're revealing one of the word plays from Ground Hog War."
"Glub what," he again glubbed.
"Glub what," said Arthur as he shook his head, "sounds like something a murderer may ask his partner while holding a club and looking for victims."

(No dwarfs were drowned in the making of this short story.)