From Longman Dictionary of Contemporary Englishswot up phrasal verbBritish EnglishSTUDY to learn as much as you can about a subject, especially in order to prepare for an examination on It’s worth swotting up on all the different types of computer before you buy one.swot something ↔ up I spent all last night swotting up German verbs. → swot→ See Verb table
Examples from the Corpus
swot on• Select one topical current affairs issue each week and swot up on it from newspapers and magazines.• Teachers spend their breaks preparing lesson plans, and their evenings swotting up on jargon.• This in turn means swotting up on the subject, going on fact-finding missions and meeting politicians and organisers. 