This week's episode of Late Night with Jimmy Fallon has sparked a lot of interest. Why? Because of the performance of Sonic Youth. Well, maybe not the performance, exactly, but more about singer Thurston Moore's t-shirt.

You can try to see it here:

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?uestlove has called it "the riskiest tshirt ive ever seen on broadcast tv....gangsta move son"

So, what was it? Answer after the jump.

Thanks to The Village Voice.