4-f

\\ˈ ̷ ̷| ̷ ̷\ noun (plural 4-f's)

Usage: usually capitalized F

Etymology: so called from the arbitrary official designation of the class of registrants consisting of those men found unfit for military service under the Selective Service System established by the United States during World War II

: one who is rejected for military service because of a physical, mental, or moral disability

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/fawr"ef", fohr"-/, n.

1. a U.S. Selective Service classification designating a person considered physically, psychologically, or morally unfit for military duty.

2. a person so classified.

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4-F or 4F «FR EHF, FOHR-», noun.

1. a United States Selective Service classification for men who are physically, mentally, or morally unfit for military service.

2. a man who is classified as 4-F.