INSULT: The American Sign Language (ASL) sign for "insult / offend"
 

The sign for "insult" uses an index finger.  Move the finger forward and up with a twisting motion.  I know what you are thinking.  Let's face it, this is a rude-looking little sign eh?

INSULT / offend:

Sample sentence: RECENT YOU INSULT ANY-ONE? (Have you recently insulted anyone?)

Note:  The sign for "insult" is directional. If you insult me, the sign moves in toward me and glances off my chest.

"I'm insulted"

Notes: 

And while we are at it, also see: "MOCK"