Meaning of “swot up (sth)” in the English Dictionary

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"swot up (sth)" in British English

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swot up (sth)

phrasal verb with swot uk /swɒt/ us /swɑːt/ verb [ I ] -tt- UK informal or child's word

to learn as much as you can about a subject, especially before an exam:

She's at home, swotting up on her maths.

(Definition of “swot up (sth)” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)