mad as a

mad as a

hatter/March hare
Crazy; mentally deranged.
See also: mad
References in classic literature ?
At the hearin' of this, ye may swear, though, I was as mad as a grasshopper, but I remimbered that I was Sir Pathrick O'Grandison, Barronitt, and that it wasn't althegither gentaal to lit the anger git the upper hand o' the purliteness, so I made light o' the matter and kipt dark, and got quite sociable wid the little chap, and afther a while what did he do but ask me to go wid him to the widdy's, saying he wud give me the feshionable inthroduction to her leddyship.
if it wasn't mesilf thin that was mad as a Kilkenny cat I shud like to be tould who it was!
Thrue for you, Sir Pathrick," it said as plain as iver a squaze said in the world, "Thrue for you, Sir Pathrick, mavourneen, and it's a proper nate gintleman ye are -- that's God's truth," and with that she opened her two beautiful peepers till I belaved they wud ha' cum'd out of her hid althegither and intirely, and she looked first as mad as a cat at Mounseer Frog, and thin as smiling as all out o' doors at mesilf.