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1. Someone who is all talk and no action. (Comes from "yakking" and "activist," and the expression "All yak and no sack"); The opposite of a pragmatist.

2. Someone with a penchant for conjuring false hopes.

3. An expert at bluffing.
1. "She keeps saying she'll quit her job, but her co-workers know she's just a yaktivist."

2. "Whenever his father promised to take him to the zoo, he had a feeling his father was just being a yaktivist."

3. "He always wins at poker because no one can tell when he's got a good hand and when he's being a yaktivist."
by Curtis Meyer March 10, 2008
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