shammus

sham(m)us

(ˈʃeməs)
n. a police officer or a detective. (Probably from Yiddish.) One thing that a shamus always knows is when another shamus is following him.
References in periodicals archive ?
You light the middle candl called the shammus,AaAeAeA firstAaAeAeA and recite the blessingAaAeAeA while holdi candle.