Two orcs chatting while one does the crossword. (You didn't know that orcs did crosswords, did you)
"I'm stuck on 3 down, he says. Flightless bird from Iceland (6,7)."
The other Orc thinks about it, "You're so thick, that's an easy one. Frozen Chicken."
(Author's note - this may be a UK only joke if you don't have an Iceland)