This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. comparative form of groovy: more groovy

"In the second room you'll find two habitués of Berghain's housier, groovier upstairs neighbour Panorama Bar, in the form of Steffi and Efdemin, while Innervisions duo Ame are the night's very special guests."