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
Teal	TEEL	English (Rare)
Mcdowell	[mək'dauəl]
Triston	TRIS-tən	English (Modern)
Thad	[θæd]
Ekkehard	E-ke-hahrt (German)	German, Ancient Germanic
Ajit	-	Indian, Hindi, Marathi, Punjabi, Bengali