Verb
1. make someone convulse with laughter;
"The comedian convulsed the crowd"2. be overcome with laughter
3. move or stir about violently;
"The feverish patient thrashed around in his bed"4. shake uncotrollably;
"earthquakes convulsed the countryside"5. cause to contract;
"The spasm convulses her facial muscles"6. contract involuntarily, as in a spasm;
"The muscles in her face convulsed"