godan verb (-ru), intransitive verb
Casual, spoken-sounding verb for making a mistake or failing at something, often with a nuance of personal blame or clumsiness. More colloquial than 失敗する.
大事な場面でしくじった。
I messed up at an important moment.
試験でしくじって、
I failed on the exam and did not get into my first-choice school.
godan verb (-ru), intransitive verb
be fired; lose one's job
Less common use meaning to lose one's position or job because of a mistake or misconduct. Often appears in phrases such as 会社をしくじる or 勤めをしくじる.
彼は無断欠勤を繰り返して、とうとう会社をしくじった。
After repeatedly being absent without notice, he finally lost his job.