Yes, trifling is a Scrabble word!
...and is worth 12 points in Scrabble, and 15 points in Words with Friends
trifling
Verb
1. Waste time; spend one's time idly or inefficiently
2. Act frivolously
3. Consider not very seriously
Adjective
1. Not worth considering
Noun
1. The deliberate act of delaying and playing instead of working
What Scrabble words can I make with the letters in trifling?
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