Multiple choice softskills communication Well, he's not that at all. He's a bird brain. a fool a criminal a conman a devil Reveal answer Fill a bubble to check yourself A Correct answer Explanation The idiom 'bird brain' means a foolish or stupid person. The speaker is saying the man is not important at all, but rather foolish. 'Criminal', 'conman', and 'devil' are not related to this idiom.