Runny Babbit: A Billy Sook is a children's book by Shel Silverstein.

A work in progress for the better part of 20 years, the book was published posthumously in March 2005.

The book is largely composed of spoonerisms in rhyming verse.

[1] Other than speaking only in spoonerisms, Runny is a normal child.

He has many friends, and two loving parents, his "Dummy and Mad," who often remind him to "Shake a tower," "Dash the wishes," "Trush your beeth," "Rean up your cloom," and other chores.