Keep in mind that this is NOT a gramatically correct phrase anyway so it would be hard to translate so it made sense. You CAN say what you want to say in Spanish, I'm sure but it would have to be said differently.
Bésame el trasero that's how u say you are crazy about me
loco
You can say "Estoy loco(a)".
¿Eres loco?
Me vuelves loco/a.
No estoy loco
Estamos locos
You say, "tortuga loca."
no demente, desquisiado, son others ways to say crazy.
You could say "Sombrero loco".
loco por ella
poeta loco