armpiece

noun
arm·​piece | \ ˈärm-ˌpēs How to pronounce armpiece (audio) \
plural armpieces

Definition of armpiece

slang
: an attractive person who accompanies someone to social events New York Giants standout Michael Strahan is a daily fixture in the New York Post these days thanks to his new armpiece Eva Pigford from “America's Next Top Model” …Speakin' Out News (Huntsville, Alabama), 28 June 2006

First Known Use of armpiece

1945, in the meaning defined above

Keep scrolling for more