To reprove or rebuke oneself; to be angry with or disappointed in oneself. Usually used in continuous tenses. I knew I'd be kicking myself later if I came back and the bag was gone, so I went ahead and bought it. Plenty of companies are kicking themselves for not investing in the technology at an earlier stage.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
kick oneself (for doing something)
Fig. to regret doing something. I could just kick myself for going off and not locking the car door. Now the car has been stolen. Don't kick yourself. It's insured.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
Berate oneself, reproach one-self, as in I've been kicking myself all day for forgetting the keys. [Late 1800s]
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.