(pron. Pask). Easter eggs, given as an emblem of the resurrection. They are generally coloured. Not, unfrequently a name written with grease, which does not absorb the colouring matter, causes a pasch egg to appear with a name on it.
The day before Easter Sunday is called Egg Saturday.
Donner un oeuf, pour avoir un boeuf. Giving a sprat to catch a mackerel. To give an egg at Easter under the expeetation of receiving a more substantial present later on.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894
More on Pasch Eggs from Infoplease: