a rush of blood
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a (sudden) rush of blood (to the head)
A sudden feeling of excitement or anger that causes one to act in unexpected ways. It must have been a sudden rush of blood to the head that made Gary lash out at Ron, because he's usually so calm.
a rush of bloodor
a rush of blood to the head
If you have a rush of blood or a rush of blood to the head, you suddenly do something foolish or dangerous which you would not normally do. It was a rush of blood by the United goalkeeper that was to cost them the game. I don't know what made me say it — I must have had a sudden rush of blood to the head.