Brainless
A person that acts without any care of what'll be the consequences of what he's doing. Also a stupid, superficial, dull person.
1. Oh, damn! You act like you're brainless! Don't you think about what will happen if you do that?
2. That boy's brainless. I suggest you to not go out with him.
2. That boy's brainless. I suggest you to not go out with him.
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