Read lorinda's article
I was messing around with SNGPT and saw that sometimes I make a push that's +EV, but if I get called I lose money...despite it being a bad call on my opponents part. So if I lose money, and he loses money, where does it go? To the other players, of course - we all know that.
But what if you didn't put yourself in positions where your opponent could make a bad play but still hurt you? What if you played in a manner that enticed your opponents to make these plays against each other? You make a minimum investment, which carries a high likelihood of getting your opponents to essentially hand over EV. With little (or no!) risk.
I believe that's the concept behind lorinda's action bluff. Apparently she says that she has a tough time finding it...so what other things can we do that achieve the same result? How can we risk as little as possible to manipulate our opponents into dumping us some of their EV?