It means you are a baboon, and I'm not.
5 seconds sound clip from the The Lion King (1994) movie soundboard.
You can hear this line at 01:04:14 in the Blu-ray version of the movie.
Quote context
[...]
- Creepy little monkey. Will you stop following me? Who are you?
- The question is, who are you?
- I thought I knew. Now I'm not so sure.
- Well, I know who you are. Shh. Come here. It's a secret.
- Asante Sana, squash banana...
- Grrr! Enough! What is that supposed to mean anyway?
- It means you are a baboon, and I'm not.
- I think you're a little confused.
- Wrong! I'm not the one who's confused. You don't even know who you are.
- Oh, and I suppose you know. Sure do.
- Bye.
[...]