Definitions:

1. to be overcome with laughter verb
   • I was convulsing during the comedian's set.
2. to cause to contract verb
   • The spasm convulses the facial muscles.
3. to contract involuntarily, as in a spasm verb
   • Upon hearing the bad news the muscles in their face convulsed violently.
4. to make someone convulse with laughter verb
   • The comedian convulsed the crowd
5. to shake uncontrollably verb
   • earthquakes convulsed the countryside

Synonyms:

• toss