Definitions:

1. A professional who specializes in writing jokes, humorous dialogue, and comedic situations for various forms of entertainment, including television shows, movies, stand-up comedy routines, and other comedic performances. NOUN
   • The gagwriter was responsible for some of the funniest scenes in the sitcom.
2. Professional who often work behind the scenes to create the funny content that comedians and performers deliver. NOUN
   • The gagwriter brainstormed with the actors to create hilarious dialogue for the upcoming sketch.

Synonyms:

• comedy writer
• gagman
• humorist
• joke writer