What is Bird Brain?
1.
Mildly insulting phrase denotes silly behaviour, actions or thoughts usually attributed to a child or immature person.
"Don't get angry at your little bro., he did not mean to pull your hair, he is a two-year old bird brain"
2.
some one who is dumber than a rock.
antonio ran into a park car. lol he is such a damn bird brain.
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