chug-a-lug
Pronunciation: (chug'u-lug"), [key] ? v., adv. -lugged, -lug•ging,
?v.t. - to drink (a container of beverage) in one continuous draught.
?v.i. - to drink a beverage in one continuous draught.
?adv. - in one continuous draught: drinking their soft drinks chug-a-lug.
Random House Unabridged Dictionary, Copyright 1997, by Random House, Inc., on Infoplease.