blow down

Verb

blow down (third-person singular simple present blows down, present participle blowing down, simple past blew down, past participle blown down)

1. (transitive) To knock over with an air current, most often wind.
   • I'll huff and I'll puff and I'll blow your house down.
   • Part of the shed was recently blown down in a gale and has been removed, leaving rather inadequate accommodation.1951 June, “Notes and News: Eskdale Railway Rolling Stock”, in Railway Magazine, page 424
2. (transitive) To clean off from top to bottom with an air current from a compressed air hose.
   • Blow down this enclosure and do some chip handling before you run this machine any further.
3. Synonym of dirty down.

   Synonyms:

   dirty down

4. (US, dated, slang, transitive) To kill (someone) with a gun.
5. (US, dated, slang, transitive) To signal to someone by blowing into a whistle.