Green’s Dictionary of Slang

bang up v.2

[the banging of the cell door]
(UK prison)

1. to imprison.

[US]Ersine Und. and Prison Sl. 16: bang, v. [...] 2. To arrest.
[UK]T. Parker Frying-Pan 87: They can bang me up anywhere, I don’t care, Dartmoor, Parkhurst, Durham.
[UK]Indep. Mag. 6 Aug. 32: They banged him up in a mental home near Milton Keynes.
[Aus]R.G. Barrett Mystery Bay Blues 56: Mullets got banged up over a huge shipment and was still on remand in Long Bay.
[UK]N. ‘Razor’ Smith Raiders 71: Neither of us has got a licence. They’d have banged us up straightaway.
[UK]G. Knight Hood Rat 135: The cops had to bang up all the serious guys.

2. (also bang out) to lock a prisoner in a cell.

[Ire](con. 1940s) B. Behan Borstal Boy 100: The screw banged out the door.
[UK]F. Norman Bang To Rights 152: They had [...] taken my dabs and banged me up in a peter.
[UK](con. 1950s–60s) in G. Tremlett Little Legs 25: Don’t bang me up ’cos I gets claustrophobia.

3. to be locked up in a cell.

[UK]P. Tempest Lag’s Lex.
[UK]T. Parker Frying-Pan 7: You can watch television [...] or whatever it is you do until quarter to nine when you bang-up then and go to bed.

4. (Aus. prison) to alert a prison officer by banging on one’s cell door.

[Aus]Tupper & Wortley Aus. Prison Sl. Gloss. [Internet] Bang up. To attract attention of officers by making a noise. Usually occurs when a prisoner is locked in his cell at night and may be ill.