• adjective satisfactory, satisfying, fine. A term of approval, sometimes in the form of a mild exclamation, from the hippy era. The adjective is derived from the verb to groove; originally an American term, it was adopted by British rock musicians, beatniks and, later, hippies from about 1965. Sounding risibly dated in the 1970s and 1980, groovy was revived first for ironic, then appreciative use from around 2000.
  • adjective tedious, dull. A vogue word among adolescents from 1988. It is probably inspired by the ironic use of the dated term of approbation.