Also found in: Thesaurus, Medical, Idioms, Wikipedia.
Related to knee-jerk: knee-jerk reflex


adj. Slang
1. Easily predictable; automatic: "quick, easy laughs and knee-jerk responses" (New York).
2. Reacting spontaneously in the expected manner: a knee-jerk cynic.

knee′ jerk`

a reflex extension of the leg resulting from a sharp tap on the patellar tendon.


Informal. reacting in an automatic, habitual manner; unthinking: a knee-jerk liberal.
ThesaurusAntonymsRelated WordsSynonymsLegend:


[ˈniːdʒɜːk] ADJ [reaction] → instintivo, automático
he's a knee-jerk conservativees de derecha or (Sp) de derechas hasta la médula
References in periodicals archive ?
Our instinct is knee-jerk support for the underdog, without doing the
We inhabit an even more knee-jerk, instant response, sound-bite planet today - and some fans, this time no journalists, are just as jittery.
It does seem to be a knee-jerk reaction to slag off all politicians and call them a waste of space and money.
New Delhi, May 19 ( ANI ): Senior Congress leader, Ajit Jogi on Monday asked the party leaders not to take any knee-jerk reaction and pointed out that, had the party effectively countered the allegations leveled by the BJP during the elections, then the party would not have had to face such level a defeat.
A long-term solution that works is never knee-jerk and is always about more than just pure technology - it is consultation-driven, it is tactical and it is people powered," he said.
It is undoubtedly improving and I think before we start making knee-jerk reactions to particular incidents we ought to bear that in mind.
ALLAN McNISH has called on motorsport leaders to avoid knee-jerk reactions when assessing new safety standards in the wake of the deaths of Dan Wheldon and Marco Simoncelli.
The reality is you just look at knee-jerk reactions in football and the consequences, there are football clubs recently in the news who have had several managers and look where they are.
We would regret such a knee-jerk reaction to the cuts.
Of course, there is a demand for quick action but a new policy a day, knee-jerk gimmicks not thought through - they won't solve the problem.
He said: "He [manager Steve Bruce] understands that because I'm a football person, there's no knee-jerk reaction whatever happens here.
We live in that knee-jerk culture where results are huge.