Definition of big E in English:

big E

noun

British
informal
  • (With the) a personal rejection or rebuff, especially insensitively or unceremoniously conveyed; the abrupt breaking off of a (romantic) relationship; frequently in to give (a person) the big E = to give (a person) the elbow.

Origin

1970s. From big + the initial letter of elbow, after to give (a person) the elbow.