Green’s Dictionary of Slang

‘A drunken man that pisses under the table into his companions’ shoes’ (Grose 1796).

1650		Eighth Liberal Science n.p.: He that pisseth under the table to offend their shoes or stockings, Vice-Admiral.
1656		J. Cotgrave Wits Interpreter 329: [A] Vice-Admiral [...] pisseth under the table to offend their shoes or stockings.
c.1786		Grose Classical Dict. of the Vulgar Tongue ms. additions n.p.: Vice Admiral of the Narrow seas. One that pisses under the Table, into his companions shoes.
1796		Grose Classical Dict. of the Vulgar Tongue (3rd edn).
1811		Lex. Balatronicum.