So please do me a favor and tell me what they really mean

Unclear lines:
1. At an elephant graveyard, Banzai says "We could have whatever's --- lion around!" And I don't have any clue about this. Does he make a kind of joke?
2. In the reunion scene, Timon says "You think you know a guy." This line is also unclear to me... I guess he wants to say that Simba is now behaving as if he is the king, but not so sure...
