from The Century Dictionary and Cyclopedia
- Same as cockle-brained.
Sorry, no etymologies found.
He laughed a bit then and said, 'My father did it to me at least that often, and you're as stubborn and cockle-headed as ever I was.'
He has a gloaming sight of what is reasonable, but he is crack-brained and cockle-headed about his nipperty-tipperty poetry nonsense.