up on

up on someone or something

Fig. knowledgeable about someone or something. Ask Tom about the author of this book. He's up on stuff like that.

Name	Pronounced	Usage
Appleby	['æplbi]
Rufino	roo-FEE-no (Italian, Spanish)	Italian, Spanish, Portuguese
Nike	-	Greek Mythology, Ancient Greek
Arata	ah-ṙah-tah	Japanese
Nirmala	neer-MAH-lah (Indonesian)	Indian, Hindi, Marathi, Tamil, Telugu, Kannada, Nepali, Indonesian
Sieger	-	Dutch, German