means The skin covering the top and back of the head, where hair grows — or, as a verb, to buy tickets cheap and resell them at a steep markup.

from From Old Norse 'skalpr,' meaning a sheath or shell, a cousin of words for things that cover and enclose — fitting, since the scalp sheathes the skull. The grisly sense of 'to remove someone's scalp' arose in colonial North America, and from the idea of taking a small piece for profit came the 19th-century American slang for ticket-scalping.