E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Giggle (g hard).
Have you found a giggles nest? A question asked in Norfolk when anyone laughs immoderately and senselessly. The meaning is, Have you found a nest of romping girls that you laugh so? Giglet is still in common use in the West of England for a giddy, romping, Tom-boy girl, and in Salop a flighty person is called a giggle. (See GAPES-NEST.)