Well Nas once said "No Idea's Original There's Nothing New Under the Sun It's Not What You Do It's How It's Done" It Depends tho. If You flip it(Sample) just like the Last Person Did, Then Shame On you.(For Example) Common - Misunderstood(Dope) Lil Wanye's - Misunderstood(You Decide) But if you just come up with some totally different then I see no problem.
