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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
Randal['rændl]
Bidelia-Irish
Yakira-Hebrew
Balch[bɔ:ltʃ]
DexDEKSEnglish
RÓIsÍNROSH-eenIrish
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