Green’s Dictionary of Slang

1. (Aus.) to defeat, to ‘do for’, to ‘settle’.

1813		V. Pyke Wild Will Enderby (2nd edn) I 62: The general impression seemed to be that Jack Ketch had been ‘slued’ (anglice, robbed of his dues) by the trio [OED].
1857		Bell’s Life in Victoria (Melbourne) 3 jan. 3/2: ‘I’ll give you six months for disorderly conduct [...] That slews you’.
1876		Sheffield Indep. 23 Dec. 15/2: That slews ye, my boys; that slews ye!
1890		‘Rolf Boldrewood’ Colonial Reformer (1891) 106: I was as right as ninepence, and then to be slewed that way, and all for the want of a strap or two.
1903		J. Furphy Such is Life 230: That slews you! Didn’t I tell you you’d be cutting yourself?
2018-20		T. Thorne (ed.) ‘Drill Slang Glossary’ at Forensic Linguistic Databank 🌐 Slew - ruin, defeat.

2. (Aus.) to deliver a tale; thus n. slew, a deception.

1860		Melbourne Punch 9 Aug. 7/1: ‘Slangiana’ [...] Cruel deception, why a slew?
1889		H. Lawson ‘The Sleeping Beauty’ in Roderick (1967–9) I 57: And thereupon old Tommy ‘slew’ / A yarn of Lambing Flat.

3. (Aus. Und.) to divert a bystander’s attention from a crime.

1975

Bulletin (Sydney) 26 Apr. 45: Marg pussies in to slew the manager.

4. (UK teen) to abuse one’s rivals; thus slewing n.

2004		Guardian Guide 24–30 Jan. 23/3: The ultimate crowd-pleaser, ‘slewing’ – slagging off the competition.
2015		www.reddit.com/r/hiphopheads Grime Terminology Guide 🌐 Slew - To ruin someone, to go against/diss someone (Early grime is packed full of crews and MCs going against each other on tracks).