slug

1. a tough-skinned terrestrial mollusc which typically lacks a shell and secretes a film of mucus for protection. It can be a serious plant pest.
2. a slow, lazy person.
3. an amount of alcoholic drink that is gulped or poured.

   he took a slug of whisky

4. an elongated, typically rounded piece of metal.

   the reactor uses embedded slugs of uranium

5. a line of type in Linotype printing.
6. a part of a URL which identifies a particular page on a website in a form readable by users.

   writers can edit the slug that will become an article or page URL

1. drink (something, typically alcohol) in a large draught; swig.

   she picked up her drink and slugged it straight back

late Middle English (in the sense ‘sluggard’): probably of Scandinavian origin; compare with Norwegian dialect slugg ‘large heavy body’. Sense 1 dates from the early 18th century.

1. strike (someone) with a hard blow.

   he was the one who'd get slugged

noun

a hard blow.

mid 19th century: of unknown origin; compare with the verb slog.