descriptive of someone who is not regarded as having a high intellect e.g." I'm afraid your honour, my client didn't understand the question as he is as thick as champ"
I'm almost finished with Robert Ludlum's novel THE ICARUS AGENDA, which has two slang phrases in it that have me scratching my head (a lot). "A two toilet Irish detective" is supposed to be American Boston-Irish slang, and I guess isn't too hard to figure out. I still wanna know!