How about some shoulder or leg

Butcher: Well, how about some veal?
Boy: Veal from a young cow.
Butcher: Yes, veal from a calf. How about some shoulder or leg?
Boy: Shoulder, leg. No, no veal, thank you, no.
Butcher: Well, this is a sheep. How about a nice leg of mutton?

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What does "shoulder" mean?

Does it mean "shank", or does it mean "chuck"?

Thank you