grawlix

noun4

1. •
   A series of images or symbols used in speech bubbles in comic strips to indicate one or more swear words.
2. •
   An image resembling an illegible scribble used for this purpose.

   • Thus, in a singles bar you’re probably better to stick with jarns, nettles, grawlices, and quimps (comic-book swearing). — 1997
3. •
   A string of typographical symbols (such as "@#$%&!") used for this purpose.

   • Hate mail is just straightforward abuse. It's a verbal stinkbomb, a middle finger from a car window, the equivalent of what is called, in the comic-strip trade, grawlixes: @%&&#!! — 2021
4. •
   A series of violence-related images (such as bombs, daggers, and skulls) used for this purpose.