It means fucked up.
Fucked up is kind of a simple word and it doesn’t really need any translation. Malaka would describe someone who does stupid, bad things all the time.
Malaka also applies to serious conditions like psychosis- which is when your perception of reality begins to unravel, or live in an entirely imaginary world where nothings wrong.
Another way to understand this word is by looking at its derivation: Malakas in Ancient Greek literally meant ‘bad’ or ‘evil’ and this meaning carried over into the modern day. Sometimes when someone says something in Greek that’s difficult for another person to understand they’ll say “that asshole said (whatever)”.