willful neglect is a noun meaning "a tendency to be negligent and uncaring". It carries one recorded sense.
a tendency to be negligent and uncaring
“he inherited his delinquency from his father”
“his derelictions were not really intended as crimes”
“his adolescent protest consisted of willful neglect of all his responsibilities”
Definitions, synonyms and semantic relations for willful neglect come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.