Yes, slur is a Scrabble word!
...and is worth 4 points in Scrabble, and 6 points in Words with Friends
slur
Verb
1. Play smoothly or legato
2. Speak disparagingly of; e.g., make a racial slur
3. Utter indistinctly
4. Become vague or indistinct
Noun
1. (music) a curved line spanning notes that are to be played legato
2. A disparaging remark
3. A blemish made by dirt
What Scrabble words can I make with the letters in slur?
2 Letter Words