The phrase dates back to 1910 (US).
bum's rush (plural bum's rushes)
- (chiefly Canada, US, slang, idiomatic) Forcible ejection from an establishment, as of a bum (hobo).
- “Baumes law” in Wikipedia. Although this has been suggested as the origin of the phrase, bum's rush was in use more than a decade before the law was passed.