What is Hooty-hoo?
1.
Generally, an acknowledgement or acceptance of terms.
"We going to Guthrie's for lunch today?"
"Hooty-hoo, motherfucker."
See
2.
Hooty Hoo is the code for the killer
How you like me now, gold teef when i smile, try to get me out da ghetto but im still buck wild...go'n back it up nigga - HOOTY HOO!