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 ?
Pakistan strongly condemned the Kabul attack on Saturday evening and later rejected 'the knee-jerk allegations by some Afghan circles to point the finger at Pakistan' for it.
Summary: 'As soon as news of interception started coming in, there was knee-jerk reaction'
Knee-jerk reaction doesn't come close to explaining it.
Dionardo Carlos said the purchase of body cameras appeared to be a knee-jerk reaction to alleged abuses and handheld radios could prove more helpful in operations.
She explained her resistance to holding up the metaphorical banner of "Je suis Charlie" as part of an effort not to jump to conclusions, not to join in groupthink, to avoid having knee-jerk reactions just because everyone else was vulnerable to them.
It is said that the fall in futures prices on Tuesday was a knee-jerk reaction to the Malaysian Palm Oil Board (MPOB) data, however, the market was seen recovering.
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.
The government is not at all worried by the daily fluctuation of the peso against the dollar and is hopeful the local businessmen would also avoid knee-jerk reactions.
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.
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.