Yes, glug is a Scrabble word!
...and is worth 6 points in Scrabble, and 10 points in Words with Friends
glug
Verb
1. Make a gurgling sound as of liquid issuing from a bottle
What Scrabble words can I make with the letters in glug?
3 Letter Words
Verb
1. Make a gurgling sound as of liquid issuing from a bottle
3 Letter Words