Green’s Dictionary of Slang

a drink made of eggs and brandy beaten up together.

1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue n.p.: Conny wabble, eggs and brandy beat up together. (Irish).
1811		Lex. Balatronicum [as cit. 1785].
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue.
1997		Share Slanguage.