The Collaborative International Dictionary of English v.0.48:
Usquebaugh \Us"que*baugh\, n. [Ir. or Gael. uisge beatha,
literally, water of life; uisge water + beatha life; akin to
Gr. bi`os life. See Quick, a., and cf. Whisky.]
1. A compound distilled spirit made in Ireland and Scotland;
The Scottish returns being vested in grouse, white
hares, pickled salmon, and usquebaugh. --Sir W.
2. A liquor compounded of brandy, or other strong spirit,
raisins, cinnamon and other spices. --Brande & C.