narrowback

[ nar-oh-bak ]
/ ˈnær oʊˌbæk /

noun Slang.

a person of slight build who is unfit for hard labor.
Disparaging. a contemptuous term used to refer to an Irish-American.

Origin of narrowback

1920–25

usage note for narrowback

This term was used by Irish immigrants to refer to the generation born in America.