[eg] 
| to incite or urge; encourage (usually fol. by on). |
"And the goode wyf answerde, that she coude speke no frenshe. And the marchaunt was angry, for he also coude speke no frenshe, but wolde have hadde egges, and she understode hym not."She did, however, recognize another customer's request for "eyren." Egg nog is Amer.Eng. c.1775, from nog "strong ale," E.Anglian dial., of unknown origin. Eggplant is 1767, originally only of the white variety. Bad egg in the fig. sense is from 1855. To have egg on (one's) face "be made to look foolish" is first recorded 1964. Egg-beater is from 1828; slang sense of "helicopter" is from 1937. Eggshell as emblematic of "thin and delicate" is from 1835; as a color term, it dates from 1894.
egg (ěg)
n.
The female sexual cell or gamete; an ovum.
egg on
Incite, urge ahead, provoke, as in Jack is always egging me on to drive faster, or Seemingly quiet, Margo actually eggs on Donald to quarrel with his staff. This expression has nothing to do with hen's eggs but comes from an Old Norse word, eggja, "to edge." Both edge on and egg on were used interchangeably, but today the latter is preferred. [c. 1200]
