Macher

n. marcher, one who marches on foot

This is a list of English language words of Yiddish language origin, many of which have entered the language by way of American English or Cockney. Spelling of some of these words may be variable (for example, schlep is also seen as shlep, schnoz as shnozz, and so on). Many of these words are more common in the entertainment industry, via vaudeville, the Catskills/Borscht Belt, and Hollywood. Others are more regionally oriented, e.g. in the New York City metropolitan area.
See more at Wikipedia.org...

n. one who does, one who creates; initiator, promoter, starter

v. chew, bite, masticate, gum, mull over

(n.)
One who marches.