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>>OK, you got my attention now - so, what does it mean and how does it look?
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>The ring and middle fingers tucked under and held down by the thumb, the index finger and pinky extended straight out.

That was very popular about 35-40 years ago - looks like it's made a come back.

Also, it's a way that infielders communicate with outfielders that there are two out. The gap between the index finger and pinky is bigger than the gap made by the peace sign so it's easier to see over a distance.