to speak finely or affectedly. N.
·vi To speak affectedly. II. Knack ·noun A petty contrivance; a toy; a plaything; a knickknack. II...
Webster's Dictionary of the English Language
·adj ·see Knock-kneed. ...
A toy-shop, a nick-nack-atory. ...
Dictionary of The Vulgar Tongue by Francis Grose