shamus

[ shah-muh s, shey- ]
/ ˈʃɑ məs, ˈʃeɪ- /

noun, plural sha·mus·es. Slang.

a detective.
a police officer.

Origin of shamus

1925–30; of obscure origin, though popularly derived from either Yiddish shames shammes or the Irish male given name Séamas

Example sentences from the Web for shamus

British Dictionary definitions for shamus

shamus
/ (ˈʃɑːməs, ˈʃeɪ-) /

noun plural -muses

US slang a police or private detective

Word Origin for shamus

probably from shammes, influenced by Irish Séamas James