Green’s Dictionary of Slang

garret n.

1. the head (cf. upper storey under upper adj.).

[Bacon Apothgm No. 17: My Lord St. Albans said that wise Nature did never put her precious jewels into a garret four stories high, and therefore that exceeding tall men had ever very empty heads].
[UK]Grose Classical Dict. of the Vulgar Tongue ms. additions n.p.: Garret, or Upper Story. The Head. His Garret, or Upper Story, is empty, or unfurnished; i.e. he has no Brains, he is a fool.
[UK]Grose Classical Dict. of the Vulgar Tongue (2nd, 3rd edn).
[UK]Lex. Balatronicum [as cit. 1788].
[US]Lafitte 10: You know when John Bull gets plenty of corn in his garret, he is apt to be a little proud and dictatorial.
[UK]R. Barham ‘The Bagman’s Dog’ in Ingoldsby Legends (1840) 335: While what’s called ‘The Claret’ / Flew over the garret.
[UK]Hotten Dict. of Modern Sl. etc.
[UK]M.E. Braddon Trail of the Serpent 60: ‘Will you have the kindness to explain what you mean by the prisoner having “a loose slate?”’ ‘A tile off. Something wrong about the roof – the garret – the upper story – the nut.’.
[Aus]H. Lawson ‘The Captain of the Push’ in Roderick (1967–9) I 187: Would you break a swell or Chinkie—split his garret with a stone?
[US]‘Hugh McHugh’ Out for the Coin 79: Isn’t it wonderful how he can make people believe that there isn’t any furniture broken in his garret.
[Aus]Sun. Times (Perth) 3 July 4/7: His hat a billy lid, and on his frayed-out boots pieces of tin to keep the ants from getting to his garret.
[UK]C. Holme Lonely Plough (1931) 190: As mun sewerly be a bit wrang in t’ garrets!
[US]Wood & Goddard Dict. Amer. Sl.
[US]Howsley Argot: Dict. of Und. Sl.

2. (UK Und.) the fob pocket.

[UK]Vaux Vocab. of the Flash Lang.
[UK]Egan Grose’s Classical Dict. of the Vulgar Tongue.
[UK]H. Smith Gale Middleton 1 149: The seedy had never a thimble in his garret, and never a sneezer in his sack.
[UK]Hotten Dict. of Modern Sl. etc. (2nd edn).
[UK]Hotten Sl. Dict.
[US]A.J. Pollock Und. Speaks.

3. the mouth.

[UK]J. Ware Passing Eng. of the Victorian Era 39/2: Garret (Street, 19 cent.). Mouth — probably suggested by the mouth being high up in relation to all the body.

4. a woman’s handbag.

[UK]Partridge DSUE (8th edn) 447/1: late C.19–20.

In phrases