watch it

watch it idiom
Also, watch out. Be careful, as in Watch it as you go down that ladder, or Watch out, there are a lot of cars on this road. The first term dates from the early 1900s, the variant from the mid-1800s. Also see look out.

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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