Mid 18th century; earliest use found in John Wesley (1703–1791), Church of England clergyman and a founder of Methodism. From the nickname Namby Pamby + -ical.
Definition of namby-pambical in US English:
namby-pambical
adjectiveˌnambɪˈpambɪkl
rare, archaic, derogatory
Of a namby-pamby nature.
Origin
Mid 18th century; earliest use found in John Wesley (1703–1791), Church of England clergyman and a founder of Methodism. From the nickname Namby Pamby + -ical.