Portuguese variants of "I am crazy"

• (Eu) sou louco (m.) (Portugal) (Brazil)
  (Eu) sou louca (f.)
• (Eu) sou maluco (m.) (Portugal)
  (Eu) sou maluca (f.)
• (Eu) estou louco/maluco
  Comment: only when the crazyness is not for life, when it's only in the moment.
• Eu to maluco
  Comment: contraction for ŽEstouŽ

Futher explanation:
- "Eu" is the personal pronoun "I", we can use it or not. In this case it's used to give emphasis.
- "Estou" is another verb, as "sou". The difference is that with "estou" we want to express a transient state, for instance, when a person thinks he is crazy, he might say "Estou maluco", but it may be only in that moment. If he really is crazy, if he has some kind of disease, then "eu sou maluco". We also say "(Eu) estou maluco" when we are very joyfull or when we do things we weren't supposed to do.

Contribution by Iuri Gaspar, Marcos Pimenta and rafaelsewo