Yes, sop is a Scrabble word!
...and is worth 5 points in Scrabble, and 6 points in Words with Friends
sop
Verb
1. Give a conciliatory gift or bribe to
2. Be or become thoroughly soaked or saturated with a liquid
3. Dip into liquid
4. Cover with liquid; pour liquid onto
Noun
1. Piece of solid food for dipping in a liquid
2. A concession given to mollify or placate
3. A prescribed procedure to be followed routinely
What Scrabble words can I make with the letters in sop?
3 Letter Words
2 Letter Words