Carle or Carling Sunday [Pea Sunday].
The octave preceding Palm Sunday; so called because the special food of the day was carling—i.e. peas fried in butter. The custom is a continuation of the pagan bean-feast. The fifth Sunday in Lent.
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Entry taken from Dictionary of Phrase and Fable, edited by the Rev. E. Cobham Brewer, LL.D. and revised in 1895.