saeva indignatio
/ˈsaɪvə ɪndɪɡˈnɑːtɪəʊ/noun
‘Savage indignation’, a feeling of contemptuous rage at human folly. Originally, and in later use often with reference or allusion to Swift's epitaph.
Origin
Late 18th century; earliest use found in Thomas Green. From post-classical Latin saeva indignatio savage indignation from classical Latin saeva, feminine of saevus fierce, furious + indignātiō.