An idea; notion; fancy. Colloquial in England and America.
Such was, after a little experience, the wrinkle adopted by Mr. Lear.--Quarterly Rev., Vol. LXXXI. p.462.
·noun A <<Winkle>>. II. Wrinkle ·noun hence, any roughness; unevenness. III. Wrinkle ·vi To shrink...
Webster's Dictionary of the English Language
A wrinkle-bellied whore; one who has had a number of bastards: child-bearing leaves wrinkles in a wo...
Dictionary of The Vulgar Tongue by Francis Grose