rattle off
rattle off or reel off {v.}
To say quickly without having to stop to think; recite easily and rapidly.
When Roger was seven he could rattle off the names of all the states in alphabetical order.
Joan memorized the "Gettysburg Address" so well that she could reel it off.
We asked the waitress what flavors of ice cream she had, and she rattled them off.
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Source: A Dictionary of American Idioms