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Big time rappers Lil Wayne and Wiz Khalifa can try to step into Kaskade’s arena any time they want ... as far as he's concerned the rappers are only helping him make more money.

We got Kaskade at LAX, and asked him if he was worried about Weezy and Wiz putting him out of business now that they're dabbling in spinning.

Check out Kaskade's reaction to the "celebrity DJs" -- it's sheer bravado.