chug
Concise Oxford English Dictionary © 2008 Oxford University Press:
chug1
▶verb (chugs, chugging, chugged) move with a series of regular muffled explosive sounds, as of an engine running slowly. ▶noun a chugging sound.
– origin C19: imitative.
Concise Oxford English Dictionary © 2008 Oxford University Press:
chug2
▶verb (chugs, chugging, chugged) N. Amer. informal consume (a drink) in large gulps without pausing.
– origin 1980s: imitative.
'chug' also found in these Oxford entries:

