alderman

1. (UK, historical, slang, obsolete) A half-crown coin; its value, 30 pence.Examples: "The price of a case (five shillings piece bad) from the smasher is about one shilling; an alderman (two and sixpence) about sixpence; a peg (shilling) about threepence; a downer or sprat (sixpence) about twopence."; "Half-a-crown is known as an alderman, half a bull, half a tusheroon, and a madza caroon; whilst a crown piece, or five shillings, may be called either a bull, or a caroon, or a cartwheel, or a coachwheel, or a thick-un, or a tusheroon."UKhistoricalobsoleteslang

2. (smoking) A long pipe for smoking.Examples: "In one part of Cockaigne an amalgamation of these two last has lately taken place; and the pleasure experienced by the parishioners of Walbrook is unbounded when smoking an alderman and churchwarden."

3. (US, slang) A large, protruding, or swollen abdomen; a paunch, a potbelly.Examples: "He'd exercise, get the fat off, because if he let it go, he'd have too much on and maybe make his heart worse, and you looked like hell with an alderman. […] And she wouldn't want a guy who stuck out in front like a balloon."USslang