macher
Concise Oxford English Dictionary © 2008 Oxford University Press:
macher /ˈmaxə/
▶noun N. Amer. informal a person who gets things done.
■ an overbearing person.
– origin 1930s: from Yiddish makher, from Mid. High Ger. Macher ‘doer, active person’.
'macher' also found in these Oxford entries:

