Meaning of “swot up (on sth)” - Learner’s Dictionary

swot up (on sth)

phrasal verb with swot uk /swɒt/ verb [ I ] present participle swotting, past tense and past participle swotted UK informal US cram

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

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