"What my name?" (meaning you are supposed to ask him what his name is)
"What's your name?"
"My name Noah. Nice to meet you. High five."
He holds out his hand and when you give him five he says, in a gruff sing-song voice, "All right!"
He will sit and do this several times with anybody that will play along including me and Dave. I think that's part of the humor for me... He acts like we've never met - "what's my name?" :)