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mug (sth) up

UK informal phrasal verb with mug
 
 
/mʌɡ/ verb [T] (-gg-)

Definition

to study a subject quickly before taking an exam: I've got to mug up (on) my History before tomorrow's exam.Knowing and learning
(Definition of mug (sth) up from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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