I'mma try to swim from something bigger than me
He’s trying to handle something he clearly can’t handle the only way possible-avoiding it.
However this could also be taken to mean that Frank is going for something that is bigger than him: He wants to make it big, and “swimming good” is to say that he’s giving it all he has.
Don’t miss the fact that he is an Ocean. Frank Ocean and an actual ocean would be bigger than him.
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