Definition of brain lock
chiefly US, informal
: a condition of temporary confusion, indecision, or mental paralysis … an outbreak of brain lock has spread through the award's nominating committee … — Seth Davis, Sports Illustrated, 31 Jan. 2000 But Hasselbeck wasn't the only Seahawk who suffered brainlock on Sunday; teammates made three or four other dumb plays … — Peter King, Publishers Weekly, 25 Oct. 2004
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First Known Use of brain lock
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