To swot up is to study hard for a test at the last minute. Swot up the night before.
It is British and informal, and a swot is somebody who studies more than their friends approve of. To swot up works for facts and fails entirely for anything needing practice.
1phraseswot upTo study hard for a test at the last minute.
“He would swot up the whole syllabus in three days.”
swot up is a phrase.
Practised in Phrasal Verbs