filly-folly
(ˈfɪlɪˌfɒlɪ)
[One of the onomatopœic reduplications expressing the notion of something trivial; cf. fal-lal.]
A foolish or ridiculous notion; a foolish hobby.
| 1565 Jewel Def. Apol. (1611) 511 Ye doe but trifle with your Filly Follies. 1765 Sterne Tr. Shandy VIII. xxxi, 'Tis the sporting little filly-folly which carries you out for the present hour,—a maggot, a butterfly..a fiddle-stick. |