harder than the back of God's head
harder than the back of God's head
slang Very hard. I can't use this pillow—it's harder than the back of God's head!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
harder than the back of God's head
Rur. very hard. The soil was harder than the back of God's head. We had a hard time digging it. The wood was solid and dense and harder than the back of God's head.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.