To kick yourself is to be annoyed at yourself for a missed chance. You will kick yourself.
It is about a chance missed rather than a mistake made, which is the finer distinction. The regret in kick yourself is usually about something small and obvious afterwards.
1phrasekick yourselfTo be annoyed at yourself for a missed chance.
“He will kick yourself when he sees what it sold for.”
kick yourself is a phrase.
Practised in Idioms