Big ass charm conversation peice
2 Chainz' chains that he wars are so big and expensive, people are talking about it — i.e. “conversation piece”.
Notice the word-play — chains are also called “pieces.”
2 Chainz is also referring to himself. He has plenty of charm & charisma on the mic; has been featured on a lot of other artists' tracks; had some mixtapes out and now has a solo album. 2 Chainz is also around 6'5'‘ tall, so he can also be considered a “big-ass charm”.
Given all of this, 2 Chainz himself is a “conversation piece” himself for numerous reasons.
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