quaff

quaff \KWOFF; KWAFF\, verb:

1. To drink a beverage, esp. an intoxicating one, copiously and with hearty enjoyment.
2. To drink (a beverage) copiously and heartily
3. An act or instance of quaffing.
4. A beverage quaffed.

He gets drunk with his guides, makes eyes at the girls and gamely quaffs snake wine.
-- Pico Iyer, "Snake Wine and Socialism", New York Times, December 15, 1991

If you were patient and kept your nose clean, you could slowly, almost effortlessly, rise from serf to squire and maybe even all the way to knight, in which case you, too, would be entitled to quaff bowl-size martinis at midday.
-- Charles McGrath, "Office Romance", New York Times Magazine, March 5, 2000

Instead they consume caviar, feed off foie gras, chomp exotic cheeses, and quaff champagne.
-- "Internet Shopper", Times (London), August 11, 2000

Quaff is of unknown origin.