From Longman Dictionary of Contemporary Englishbrush somebody/something ↔ down phrasal verb1 CLEANto clean something using a brush He was brushing the pony down.2 brush yourself down to use your hands to remove dirt from your clothes, especially after you have fallen → brush→ See Verb table
Examples from the Corpus
brush yourself down• Give me a couple of minutes, will you? Brush yourself down while you're waiting. 