Regional Note: A pig in a poke is concealed in a sack from the buyer. The noun pokemeaning a bag or sackdates from the 14th century in English. In many parts of Scotland poke means a little paper bag for carrying purchases or a cone-shaped piece of paper for an ice-cream cone. The Oxford English Dictionary gives similar forms in other languages: Icelandic poki, Gaelic poc or poca, and French poche.
When I moved into my first flat I used to take the dog a walk through town to the park. He would walk past the Butcher's shop and sniff around the doorway. When we got to the chip shop down the road from that he would go totally ballistic - trying to ram his way into the shop. It was funny at the time - he was the size of a horse and looked like Scooby Doo.