Definitions:

1. A person who writes jokes, gags, and humorous dialogue for various forms of entertainment. NOUN
   • The veteran gagman was known for his quick wit and ability to come up with funny lines on the spot.
2. Term used in the entertainment industry to refer to a writer or performer who specializes in creating jokes, humorous dialogue, or comedic situations. NOUN
   • The film's success was largely due to the brilliant work of its gagman, who wrote all the funniest scenes.

Synonyms:

• comedy writer
• gagwriter
• humorist
• Joke writer