As a child, Zaphod had been diagnosed with ADHDDAAADHD (ntm) ABT which stood for Always Dreaming His Dopey Days Away, Also Attention Deficit Hyperflactulance Disorder (not to mention) A Bit Thick. Eoin Colfer
I've got a sister in Australia, so when I phone her up there is a slight delay on the line after I've spoken because she's a bit thick. Harry Hill
He was a thorough good sort; a bit limited; a bit thick in the head; yes; but a thorough good sort. Whatever he took up he did in the same matter-of-fact sensible way; without a touch of imagination, without a sparkle of brilliancy, but with the inexplicable niceness of his type. Virginia Woolf