Green’s Dictionary of Slang

(US) a drunkard.

1955

B. Appel Tough Guy [ebook] [A] slow-footed two-footed whiskey barrel rolling homewards from the saloons, so drunk he seemed to be strolling in the springtime.

a Scottish drunkard.

1909

J. Ware Passing Eng. of the Victorian Era.

(US) impotent.

2005

R. Cea No Lights, No Sirens 45: [A] bunch of whiskey-dicked cops at the bar trying to chat up the same three or four nurse.

one who drinks a great deal of whisky [-head sfx (4)].

1937		C. Himes ‘Every Opportunity’ Coll. Stories (1990) 245: He wished he had a shot. Not that he was a whiskey-head, he quickly added. Of course he liked his liquor.
1951		Kerouac On the Road (The Orig. Scroll) (2007) 315: He doesn’t drink any more and he used to be the biggest whiskeyleg in town.
1968		P. Oliver Screening the Blues 23: Blues about liquor and the ‘whisky-head man’ [...] figure in the work of singers of all generations.

(US) a mixed drink containing a large proportion of whisky.

1855		‘Q.K. Philander Doesticks’ Doesticks, What He Says 230: After Macbeth has murdered Duncan, and Macduff has finished Macbeth, they all three take a ‘whisky skin,’ and agree to go fishing next Sunday.
1859		C. Mackay Life and Liberty I 169: ‘Gin-sling,’ ‘brandy-smash,’ ‘a streak of lightning,’ ‘whisky-skin,’ ‘mint-julep’ [etc] [DA].
1871		J. Hay ‘Mystery of Gilgal’ Pike County Ballads 24: Says he, ‘Young man, the tribe of Phinns Know their own whiskey-skins!’.
1891		G.A. Sala in Times 22 Feb. 2/3: The scheme of [the London American club] [...] seemed to comprise unlimited cocktails, whiskey skins, corpse revivers [etc] [DA].

see it’s the beer talking under talk v.