Groovy (adjective)

1. Fashionable and attractive; stylish.
2. Excellent; pleasing.
3. Informal, lively and exciting.

Origin:

Slang, originally us, from the phrase in the groove, from the sense of the word groove "a channel for a ball bearing".

Examples:

1. The party was groovy and had a great atmosphere.
2. He thought that his new suit was groovy and trendy.
3. This music is groovy and makes you want to dance.
4. The 60s were all about groovy clothes and wild parties.
5. The atmosphere of the city was groovy and exciting.