gagwriter
/ˈɡæɡˌraɪtər/
noun
- A person who writes jokes or humorous material for a comedian, show, or publication.
- The late-night show hired a new gagwriter to punch up the monologue.
- A good gagwriter can turn a simple observation into a hilarious one-liner.
- She worked as a gagwriter for several popular sitcoms in the 1990s.