Green’s Dictionary of Slang

alderman n.

[the image of a paunchy, pipe-smoking, wealthy administrator of the City of London]

1. [late 18C–mid-19C] a roast turkey.

2. [mid-19C] a long smoking pipe; thus broken alderman, a short pipe.

3. [mid–late 19C] half-a-crown, 2s 6d (12½p).

4. [late 18C; 1910s–40s] a paunch; thus aldermanic, portly.

5. [late 19C–1950s] a large crowbar [on pattern of citizen n. (1); gentleman n.; lord mayor n.1 : smaller and larger versions of the tool].

In compounds

alderman double-slang’d (n.) [slang v.2 ]

[late 18C] a roast turkey garlanded with sausages.

alderman in chains (n.) [SE chains (of sausages); ‘from the appearance of the City fathers, generally portly – becoming more so when carrying their chains of office over their powerful bust’ (Ware); note Jonson, Masque of the Gipsies (1621): ‘Two roosted Sheriffs came whole to the bord [...] theire Chaines like sausages hung about ’em’]

[19C–1900s] a turkey garlanded with sausages.

alderman’s pace (n.)

[17C] a steady, careful pace, as befits an official with a fine sense of his own importance.