Verb. (common).—1. To spend; and (2) to ruin. 1851–61. Mayhew, Lond. Lab., i. 20. He’d muck a thousand! 1892. Milliken, ’Arry Ballads, p. 75. Wot mucks me, old man. Ibid. p. 70. I’m mucked, that’s a moral.