Green’s Dictionary of Slang

twicer n.

[SE twice]

1. one who attends church twice on a Sunday.

[UK]V. Alsop Mel. Inquirend. ii i 170: What if a thousand or two more of Ministers were silenced [...]? What if Lectures were proscribed, private Conferences interdicted, and your Twicers suspended? [OED].
[UK]Onlooker’s Note-Bk xxiii 180: In his [Gladstone’s] view every respectable person should be a ‘Twice-er.’ [OED].
[Aus]World (Hobart) 25 Feb. 4/4: Last Sunday a well-known Hobart clergyman rather startled his congregation by announcing that he had a strong predilection for ‘twicers.’ [...] what the preacher so much desired was parishioners who went twice to worship on Sunday, and not once. The ‘oncers’ looked guiltily at each other, and the ‘twicers’ were conspicuous by their absence.

2. (Aus. Und.) one who has twice been convicted of a criminal offence.

Moreton Bay Free Press 28 Apr. 3/5: He was at once despatched on board a steamer for the Hunter, in company with [...] two ‘twicers’ from Norfolk Island [AND].

3. something or someone very important, i.e. doubly valuable, relevant, forceful etc.

[UK]A. Mayhew Paved with Gold 342: Here’s a start! a reg’lar twicer!
[UK] ‘’Arry in Venice’ in Punch 27 May 88/1: Bless his twirly moustache, he’s a twicer.

4. (Aus.) a sycophant [SE two-faced].

[Aus]H. Lawson ‘Modern Parasites’ in Roderick (1967–9) I 192: O yes! when time is ripe to storm the robber in his lair, / And there is danger in the camp — the twicer isn’t there.

5. (orig. Aus.) a confidence trickster, one who engages in any form of ‘double-dealing’.

[Aus]Truth (Sydney) 24 Oct. 4/4: I […] cannot fail to observe the evil intention lurking beneath that stamps the writer as the twicer he is [AND].
[Aus]Stephens & O’Brien Materials for a Dict. of Aus. Sl. [unpub. ms.] 162: TWICER: slang a two-faced person, one who breaks his promises or pledges.
[Aus]Truth (Melbourne) 7 Feb. 6/5: [headline] Turf Twicers in Tassy.
[UK]T. Burke Limehouse Nights 249: Bert – yeh bleeding twicer, if I get ’old of yeh I’ll...
[UK](con. WWI) Fraser & Gibbons Soldier and Sailor Words 292: Twicer: A cunning fellow. One given to take by stealth more than his due.
[UK]G. Kersh Night and the City 58: Who’s going to buy bentwood chairs off Lipsy, that twicer!
[UK]R. Llewellyn None But the Lonely Heart 330: I ain’t forgot, you old twicer, you.
[UK]G. Kersh Fowlers End (2001) 289: That twicer wants to get in on it, this property deal. That dirty rotten bastard wanted to cut in on me.
[UK]Barltrop & Wolveridge Muvver Tongue 89: ‘Twicer’ stands for a deceitful person.

6. a widow or widower who marries for the second time.

[UK]Partridge DSUE (8th edn) 1277/2: C.20.

7. (Aus.) a very demanding person, lit. one who asks for two helpings of food.

[UK]Partridge DSUE (8th edn) 1277/2: C.20.

8. two of something; e.g. a whipping, a two-year prison sentence.

[Aus]‘Banjo’ Paterson ‘Victor Second’ in Three Elephant Power 113: When we found out about it we gave the boy a twicer with the strap, and he left and took out a summons against us.

9. (Aus.) a girl who is conducting two relationships simultaneously.

[Aus]N. Lindsay Mr. Gresham and Olympus 251: ‘Take the case and no names mentioned. A girl is travellin’ with a bloke. Whether that girl is a twicer or not, that girl is on view for that bloke’s opinion. Therefor a bloke that puts a finger on that girl gets his face pushed in’ .

10. (UK Und.) a two shilling piece.

[UK]V. Davis Phenomena in Crime 253: Twicers. Two shilling pieces.