Here are some ways it's used:
* "He's a malo loco." - This would indicate the speaker believes the person is a reckless and potentially dangerous individual.
* "Don't get involved with him, he's malo loco." - This would suggest the person is unpredictable and could cause trouble.
However, it's important to note that "malo loco" is a slang term and its specific meaning can vary depending on context and region. It's always best to consider the specific situation and the people involved when interpreting the phrase.