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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.
See also: on, up

Common Names:

NameGenderPronouncedUsage
Dulcibella-English (Archaic)
Iser-Yiddish
Penn[pen]
GerhardtGER-hahrtGerman
Luis['luis]
Antonietta-Italian
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