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Common sense. I'm not surprised he got hurt—that kid doesn't have the horse sense to get out of a dangerous situation.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
Fig. common sense; practical thinking. Bob is no scholar but he has a lot of horse sense. Horse sense tells me I should not be involved in that project.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
Sound practical sense, as in She's got too much horse sense to believe his story. The exact allusion in this term, which dates from the mid-1800s, is disputed, since some regard horses as rather stupid. However, they tended to be viewed more positively in the American West, where the term originated.
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.
Good common sense. The origin of this Americanism is a matter of dispute, since there is considerable disagreement concerning the native intelligence of horses. Some think they are rather stupid animals, although it is generally conceded that they have enough sense to return to their barn whenever they have a chance. Others believe the shrewdness denoted by horse sense is possessed principally by horse traders, who are well known for that quality. In any event, the term originated in the first half of the nineteenth century in the American West and was still considered relatively new in 1870, when it was defined in an issue of The Nation, although it had appeared in print a number of times from 1833 on. Comedian W. C. Fields supposedly said, “Horse sense is a good judgment that keeps horses from betting on people.”
The Dictionary of Clichés by Christine Ammer Copyright © 2013 by Christine Ammer