snippiest
/ˈsɪpɪst/Definitions
1. adjective
most quick to anger or annoyed, often in a sharp and sudden way
“She had a reputation for being the snippiest person in the office, always ready with a witty remark.”
2. superlative degree of snippy
most characteristic of snippy
“He was the snippiest of all the siblings, always ready to lash out at his family members.”