4-F

[ fawr-ef, fohr- ]

noun

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

Example Sentences

That exercise led to the discovery that a compound termed 4-F, 5-MeO-PyrT was the most 5-HT1A-selective compound in this series.

From Science Daily

Lyonna Parise, PhD, an instructor in the lab of Scott Russo, PhD, Director of the Center for Affective Neuroscience and the Brain and Body Research Center at Icahn Mount Sinai, then tested that lead compound in a mouse model of depression and showed that 4-F, 5-MeO-PyrT had antidepressant-like effects that are effectively mediated by 5-HT1A.

From Science Daily

He’d recently been in a motorcycle accident that resulted in a concussion, and the Army declared him 4-F.

From Los Angeles Times

A housewife flirts with a jazzy 4-F co-worker at a World War II aircraft plant.

From Los Angeles Times

That 1945 season was the final year of wartime baseball, an unusual era when many of the game’s best players were fighting overseas, forcing teams to use some men who were either too old to serve or designated 4-F — unfit for service.

From Washington Post