He's frae the tap o' the wing, but ye're a grey-neck quill.
Meaning, we presume, that a man is not so good as he would like to be thought, or as some person he may have compared himself with.
He's free o' fruit that wants an orchard.
He's fond o' barter that niffers wi' Auld Nick.
He's gane aff at the nail.
Or "destitute of any regard to propriety of conduct; mad; wrongheaded; tipsy."—Jamieson.
He's gane a' to pigs and whistles.
"Hech, sirs, what a kyteful o' pride's yon'er! and yet I would be nane surprised the morn to hear that the Nechabudnezzar was a' gane to pigs and whistles, and driven out wi' the divors bill to the barren pastures of bankruptcy."—The Entail.
He's gane ower the buss taps.
"To behave extravagantly; to go over the tops of the bushes."—Jamieson.