The key to writing comic book terms is research and creativity. Research various comic book styles and note the specific terms used in each. And when creating your own terms, think about how they'll enhance the reader's understanding and immersion in the story. It's a balancing act of staying true to the genre while adding your own flavor.
To write comic book terms well, start by understanding the genre and its conventions. Study the language used in popular comics and note how terms are employed for specific effects. Also, don't be afraid to invent your own terms if they fit the unique world you're creating, but make sure they're intuitive and consistent within your story.
Well, first you need to do a lot of reading of existing comic books to familiarize yourself with common terms. Then, practice writing and using them in your own stories. It's all about repetition and exposure.