knee-jerk (n  jûrk )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
Noun
Physiol a sudden involuntary kick of the lower leg caused by a sharp tap on the tendon just below the kneecap
Adjective
kneejerk
made or occurring as a predictable and automatic response: a kneejerk reaction
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