1778, George Colman, Prologue to The Suicide, in Prose on Several Occasions: Accompanied with Some Pieces in Verse, London: T. Cadel, 1787, Volume 3, p. 225,
With Two Act Pieces what machines agree?
Buggies, Tim-whiskies, or squeez’d Vis a-vis,
Where two sit face to face, and knee to knee.
Source: wiktionary
It was a two-wheeled vehicle, which claimed none of the modern appellations of tilbury, tandem, dennet, or the like; but aspired only to the humble name of that almost forgotten accommodation, a whiskey; or, according to some authorities, a tim-whiskey.
Source: wiktionary
1837, Robert Southey, The Doctor, London: Longman, Rees, Orme, Brown, Green and Longman, Volume 4, Interchapter 14, p. 43,
It is not like the difference between a Baptist and an Anabaptist, which Sir John Danvers said, is much the same as that between a Whiskey and a Tim-Whiskey, that is to say no difference at all.
Source: wiktionary