blow down

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.

   • 1951 June, “Notes and News: Eskdale Railway Rolling Stock”, in Railway Magazine, page 424:

     Part of the shed was recently blown down in a gale and has been removed, leaving rather inadequate accommodation.

   • 2020 June 3, Andrew Mourant, “A safer railway in a greener habitat”, in RAIL, page 58:

     A tree had been blown down on the track east of Chippenham. Bath Spa station became a scene of milling confusion. One minute we were told that trains were running. Then they weren't. Then they were again. Not a sound basis on which to try rejigging a business trip.

2. (transitive, manufacturing) To clean off from top to bottom with an air current from a compressed air hose.

   Coordinate terms: rinse down, wash down

   Blow down this enclosure and do some chip handling before you run this machine any further.

3. (television) Synonym of dirty down