Definition of nosher in English:

nosher

(also nasher, nascha)

noun

informal
  • A person who is fond of snacking or nibbling on food; a snacker; a diner. In early use: specifically a person who samples food before buying it.

Origin

Early 20th century; earliest use found in Jewish Child. Probably partly from Yiddish nasher (from Middle High German nascher, nescher (German Nascher, (now rare) Näscher) person with a sweet tooth from naschen, neschen to eat dainty food or delicacies + -er), and partly from nosh + -er.

Pronunciation

nosher

/ˈnɒʃə/