It depends on how it is to be understood.
If you mean to say that you are not well or that you feel sick, the translation is "No estoy bien."
If you mean to say that you are a wicked person, the translation is "No soy bueno."
"Not very happy" in Spanish is "no muy feliz". It is pronounced "no mwee fay-LEASE". Please see this site for confirmation of the translation: http://www.answers.com/library/Translations
No muy bien.
literal no es mucho ,no mucho
No hablo muy bien español.
Mi español no es muy bueno.
ipaco mel amor
no mucho
muy bien.
Eso es buenísimo.
"Bueno" means good in Spanish.
You could say "Así que tu familia es buena".
It means,"Good, and you?" So you would say "Bien, gracias" (Good, thank you)
To say "You are good" in spanish you say: eres bueno
bueno is good in Spanish.
"Real good" is "bueno verdadero" in Spanish
"Good morning" in Spanish is "buenos días".
3 pm is in the afternoon, so you would say "Buenas Tardes!" or, good afternoon!
Yo no soy tan bueno or no soy tan bueno
No muy buena is the best way to say "not very good" in Spanish.
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.