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Definition of headcase

headcase

/ˈhɛd.keɪs/
head · case
Plural:headcases
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headcase Lexical Profile

headcase Game Scores & Validity

• noun

1

(slang, derogatory) A person who is considered mentally unstable, eccentric, or prone to erratic and unpredictable behavior.

Example

"The talented pitcher had all the physical tools to succeed, but coaches worried he was a headcase who would lose his composure under pressure."

Synonyms
View all synonyms for headcase

Word Nuance & Usage

'Headcase' is an informal, derogatory slang term used to describe someone perceived as erratic or unstable, and it should be avoided in formal contexts or when discussing genuine mental health conditions.

• Nearby Words

headbutt
headbutter
headcam
headcase
headcloth
headcount
headdress

Cite this Entry

Wordmom. (2026). Definition of Headcase. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/headcase
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