noun
nutcase
NUHT-kays
noun
1
Informal: a crazy, eccentric, or foolish person.
"Only a nutcase would go swimming in that weather."
How to Use Nutcase
Learner’s notesIn plain EnglishA casual, slightly mocking word for someone acting crazy or foolish.
When to use it
Informal and can be mildly insulting; use with care.
Easily confused with
headcase
Word Forms
nutcases plural
Study it as flashcards or scroll it in Flow — saved to your collection.
Test yourself on “nutcase”
A quick quiz — meaning, synonyms & usage
→
Fill the Gap
Can you complete this real example?
Only a _____ would go swimming in that weather.
Etymology
A compound of nut (in the sense of "crazy person") and case, as in "headcase".