Clyde Heffley

"Muurp?"

—Clyde Heffley asking Greg Heffley of something unknown.

Clyde Heffley was Greg Heffley's great-uncle who only appeared in the online book, he was replaced by Arthur Heffley in the book series. He doesn't appears to say any words but mutter noises like "Muurp" "Ruup". This confuses Greg because he doesn't know if he is really meaning something or not, just like Arthur Heffley. He stayed at the Heffley's house for two days on Thanksgiving day.