She got a big booty so I call her Big Booty
And for all you cats throwing shots at 2 Chainz for this line: B.I.G. wrote a very similar one.
This one line sparked a lot of mockery of 2 Chainz’s lyrical ability and it is also known as his most memorable line, leading to internet memes such as this one being made.
To help improve the meaning of these lyrics, visit "Birthday Song" by 2 Chainz (Ft. Kanye West) Lyrics and leave a comment on the lyrics box