GUEST, Robert L gave us these lines:

Oh, I forgot it.
Well get out of here you silly blocket (sic), don't come round here without no pocket.

and GUEST EK gave us:

Where's your pocket?
I forgot it.
Get along home you silly blockhead.

I'd bet money that "blocket" was one of three things, probably from way back in the folk processing:
   a Mondegreen for "blockhead", or
   a deliberate change for the sake of the rhyme, or
   a dialectal version of "blockhead".

My pick of the above would be the third one.