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1) Used to announce your profound agreement with a statement.

2) To acknowledge that something someone recommended is really good.
1)
a: "I think that Daft Punk are a good band"
b: "fucking bang"

2)
a: "You should listen to Harder, Better, Stronger, Faster"
b: "ok"
2 weeks later
a: "did you listen to Harder, Better, Stronger, Faster?"
b: "Yeah, fucking bang!"
by Grogberg March 12, 2008
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