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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
Nina (2)-Near Eastern Mythology
DieudonnÉdyuu-do-NEFrench
Pack[pæk]
Verusha-Russian
Kyriaki-Greek
Amindaah-MEEN-dahEsperanto
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