Green’s Dictionary of Slang

scud n.

[Scot. scud, a blow]

1. (UK school) a fast runner.

[UK]T. Hughes Tom Brown’s School-days (1896) 86: I say [...] you ain’t a bad scud, not by no means.

2. (Ulster) a jinx.

[Ire]Share Slanguage.

3. (also scood) a general term of abuse.

[US]H. Ellison Rockabilly (1963) 91: ‘Little scud!’ he cursed him.
[US]Baker et al. CUSS 189: Scud / alt. Scood / An ugly person, female.
[Ire]J. Morrow Confessions of Proinsias O’Toole 39: ‘He’s a friggin’ scud for my money,’ I said.
[US]Eble Campus Sl. Mar. 8: scud – unusually ugly girl or guy.
[UK](ref. to 1991) Morgan & Neil Teaching modern Foreign Langs 285: Fall 1991 A total of 79 terms about women [...] This reflects the importance of women's looks over almost everything else about them, except sexual activity: butch, GG (gangster girl), heifer, hellpig, hiddie, hobag, scud, tuna.

4. sexual intercourse; thus scud flick, a pornographic film, scud mag a pornographic magazine.

[Scot]I. Welsh Decent Ride 31: This burd ah ken, done some scud wi her.
[Scot]I. Welsh Decent Ride 41: Banewd aboot half a dozen ay thum aw eyes, even goat one intae the scud flicks.
[Scot]A. Parks Bloody January 97: McCoy slid the bedside drawer open. Couple of scud mags. Biker Orgy, Cavalcade.
[Scot]A. Parks May God Forgive 30: Dirty Ally [...] Sold second-hand scud mags at Paddy’s, developed photos for people who couldn’t take their film to Boots.
[Scot]A. Parks May God Forgive 158: ‘I’m a fucking polis and not a scud bookseller’.