Another great saying tied to Texas' love of the land. Expressions for "stupid" are the second most common in Texas lore.
If all her brains were dynamite, she couldn't blow her nose.
He couldn't find his butt with a flashlight in each hand.
If brains were leather, he couldn't saddle a flea.
He couldn't pour rain out of a boot with a hole in the toe and directions on the heel.
Sharp as a mashed potato.
