Wikipedia defines a drabble as a piece of writing exactly 100 words in length.

http://en.wikipedia.org/wiki/Drabble

We won't hold you to exactly 100, but it should be close. Remember, this isn't a place for unfinished stories or chapters (Though drabbles as chapters in a larger work are fine), this is a place for complete 100 word stories.

Give it a go! It's fun.

(I've only recently joined, and this is my first group to start. Please let me know what I can do to improve the group.)