To react without thinking. To form an opinion without paying attention.
When he said he was a Republican, the college student's kneejerk reaction was to boo him.
by </time> September 14, 2003
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When a person responds or reacts due to past experiences or trauma without being mindful of the consequences of said response.
Her kneejerk response was to say she didn't believe in love...
by Bevrlykills January 02, 2020
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The second-leading source of antitrust, right on the heals of MyCrudSoft sWindles. Frequently euphemized as Network Solutions, Incorporated.
In 1999 and 2000 Kneejerk Corruptions, Incorrigible held my domain name for ransom for seven months while I tried to transfer it to a different registrar, until I got the Better Business Bureau on their case.
by Downstrike September 13, 2004
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People who act brashly without any rationale or thought to ongoing events or latest fads just for the sake of it with utter lack of understanding
These kneejerks know not why they protest against the movement.
by BatteringRam June 20, 2020
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