Yes, glop is a Scrabble word!
...and is worth 7 points in Scrabble, and 10 points in Words with Friends
glop
Noun
1. Any gummy shapeless matter; usually unpleasant
2. Writing or music that is excessively sweet and sentimental
What Scrabble words can I make with the letters in glop?
3 Letter Words
2 Letter Words