Green’s Dictionary of Slang

bulchin n.

also bull chin
[SE bulchin, a bull-calf]

1. a term of contempt to any male.

[UK]Marston Dutch Curtezan II i: I was at supper last night with a new weande bulchin, bread a God, drunke, horribly drunke.
[UK]Middleton & Rowley A Fair Quarrel IV iv: The bulchins will use the Irish captain with respect.
[UK]Ford Fancies III iii: Roguery, brokage and roguery, or call me bulchin.

2. a term of endearment to a child, usu. a chubby one.

[UK]J. Shirley Gamester IV i: How is’t, Bulchins? Would you had been with us.
[UK]B.E. Dict. Canting Crew n.p.: Bulchin a Chubbingly Boy or Lad.
[UK]New Canting Dict.
[UK]Bailey Universal Etym. Eng. Dict.
[UK]Grose Classical Dict. of the Vulgar Tongue n.p.: Bull chin, a fat chubby child.
[UK]Lex. Balatronicum.
[UK]Egan Grose’s Classical Dict. of the Vulgar Tongue.