- (slang, uncountable) Heroin.
- (slang, countable, derogatory, originally African American Vernacular) A woman of loose morals.
- (slang, countable, dated, US) A cigarette.
- 1915, “The Doomsday Butt”, in The Cornhusker, page 458:
- “Then have a skag,” said I. / “’Twill make it seem like happier times, / You liked this brand, I understand.”
- 1996, Paul Bunker and Keith Barlow, Bunker's War: The World War II Diary of Paul D. Bunker, page 134:
- Awoke when our florescent lights came on and went outside to smoke a few scags before breakfast.
- (computing) To destroy the data on a disk, either by corrupting the filesystem or by causing media damage.
- "That last power hit scagged the system disk."
From Old Norse [Term?].
* Indirect relative
† Archaic or dialect form
- C. Marstrander, E. G. Quin et al., editors (1913–76), “scacaid”, in Dictionary of the Irish Language: Based Mainly on Old and Middle Irish Materials, Dublin: Royal Irish Academy, →ISBN
- "scag" in Foclóir Gaeilge-Béarla, An Gúm, 1977, by Niall Ó Dónaill.
- Entries containing “scag” in English-Irish Dictionary, An Gúm, 1959, by Tomás de Bhaldraithe.
- Entries containing “scag” in New English-Irish Dictionary by Foras na Gaeilge.