Yes, goof is a Scrabble word!
...and is worth 8 points in Scrabble, and 9 points in Words with Friends
goof
Verb
1. Commit a faux pas or a fault or make a serious mistake
Noun
1. A man who is a stupid incompetent fool
2. A person who amuses others by ridiculous behavior
What Scrabble words can I make with the letters in goof?
3 Letter Words
2 Letter Words