GNU Collaborative International Dictionary of English

last match results

Found 2 definitions

1.       
   Knee jerk. (Physiol.) A jerk or forward kick of the lower part of the leg produced by a blow or sudden strain upon the patellar tendon of the knee, which causes a sudden contraction of the quadriceps muscle; the patellar reflex.
   Webster 1913 Suppl.
         
       

2.       
   Knee jerk, n. emotional and predictable; -- of certain people and their reactions to events.
   PJC