The noun "scalp" refers to the part of the head where hair grows, or used to grow, as well as historically being a part of the skin of the head with hair attached that was taken from enemies as a token of victory, and in heraldry, it can also refer to the skin of the head of a stag with attached horns.

(figurative) A victory, especially at the expense of someone else.

(Scotland) A bed or stratum of shellfish.

(figurative) The top; the summit.

To remove the scalp (part of the head from where the hair grows), by brutal act or accident.

(Canada, US, slang) To resell, especially tickets, usually for an inflated price, often illegally.

(gambling) To bet on opposing competitors so as to make a profit from the bookmaker.

(finance) On an open outcry exchange trading floor, to buy and sell rapidly for one's own account, aiming to buy from a seller and a little later sell to a buyer, making a small profit from the difference (roughly the amount of the bid/offer spread, or less).

To screen or sieve ore before further processing.

(surgery) To remove the skin of.

(transitive) To remove the grass from.

(transitive) To destroy the political influence of.

(milling) To brush the hairs or fuzz from (wheat grains, etc.) in the process of high milling.