The terms seizure, convulsion, or epilepsy are most often associated with generalized tonic clonic seizures if you see someone have a it can either be scary funny, depending on whether it's caused by medical condition really funny joke. 2013 june 18 convulsion definition the definition of a convulsion is a violent uncontrolled body shake, (medicine) an intense, paroxysmal, involuntary muscular contraction 23 mar 2017 a convulsion with no temperature (no fever); Short spells of ...