triggerman

[ trig-er-muh n, -man ]
/ ˈtrɪg ər mən, -ˌmæn /

noun, plural trig·ger·men [trig-er-muh n, -men] /ˈtrɪg ər mən, -ˌmɛn/. Informal.

a gangster who specializes in gunning people down.
a bodyguard, especially of a gangster.
Also called trigger.

Origin of triggerman

First recorded in 1920–25; trigger + man1

British Dictionary definitions for trigger man

triggerman
/ (ˈtrɪɡəˌmæn) /

noun plural -men

a person, esp a criminal, who shoots another person