(Slang) Great; splendid; fine:
The definition of groovy is slang to describe something that is very good, fun, or nice looking.
Very good; better than expected but not as good as could be.
(Slang) Excellent, good, funny, etc.
(Slang) Excellent, wonderful, delightful, etc.
Find another word for niftier. In this page you can discover 7 synonyms, antonyms, idiomatic expressions, and related words for niftier, like: keener, groovier, dandier, hotter, dreamier, worse and better.