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1. To anchor or fasten something in place, as with bolts. A noun or pronoun can be used between "bolt" and "down." We need to bolt down the shed before the big storm. If that panel keeps popping up, we're going to need to bolt it down.
2. To eat something quickly. A noun or pronoun can be used between "bolt" and "down." He bolted down his dinner because he was already late for the airport. Savor it a little, will you? Don't just bolt it down!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
bolt something down
1. Lit. to fasten something down securely with bolts. Did anyone bolt the washing machine down? Someone should bolt down this washing machine.
2. Fig. to eat something too rapidly. Don't bolt your food down. She bolted down her dinner and ran out to play.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.