Meaning of the statement "Are you playing thick or just are? "

Solution 1:

I think here playing thick refers to 'pretending to be fool', so the the person is asking, "are you pretending to be a fool, or are you a fool?"

• Informal Lacking mental agility; stupid.

(AHD)

Solution 2:

Playing thick is not an idiom: it is simply made up of colloquial meanings of the two words - play meaning "pretend" and thick meaning "stupid".

Solution 3:

Are you being idiotic on purpose or are you naturally that way?

Solution 4:

The idiomatic version of this that I know reverses the sentence and goes along the lines of:

"Are you thick (i.e. stupid), or just mucking about (i.e. messing with my mind)?"

Solution 5:

Thick skulled, but many times the latter isnt used.. just "being thick"