unlaugh
/ˌʌnˈlɑːf/Definitions
1. noun
The act or sound of laughing, especially in a mocking or sarcastic manner.
“She met his unlaugh with a sarcastic comment that made everyone in the room laugh even harder.”
2. verb
To laugh mockingly or sarcastically at something or someone.
“He unlaughed at the comedian’s joke, clearly not finding it funny.”