GROOVY
groovy, swagger
(adjective) (British informal) very chic; “groovy clothes”
bully, bang-up, corking, cracking, dandy, great, groovy, keen, neat, nifty, not bad, peachy, slap-up, swell, smashing, old
(adjective) very good; “he did a bully job”; “a neat sports car”; “had a great time at the party”; “you look simply smashing”; “we had a grand old time”
Source: WordNet® 3.1
Etymology 1
Adjective
groovy (comparative groovier, superlative grooviest)
Of, pertaining to, or having grooves.
(dated) Set in one's ways.
Etymology 2
Adjective
groovy (comparative groovier, superlative grooviest)
(dated, slang) Cool, neat, interesting, fashionable. [popular in the 1940s and again in the 1960s]
Noun
groovy (plural groovies)
(dated, slang) A trendy and fashionable person.
Source: Wiktionary