I read an article, and here is an excerpt:
"One instance involved a staff member emailing his work group to say he'd completed a job, which the interviewee interpreted as 'big-noting' himself," Dr Yell said. "Consequently, he replied with a sarcastic email, cc'ed to the group, asking 'what took him so long', in order to 'kick him off his peg'.
What does "kick him off his peg" mean? And what is it's origin?