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it's really interesting to see who latches onto these weird things first. sometimes an important person (a boss or a client) will drop a new term like that in a meeting and certain people will instantly and unquestioningly adopt it.
at my old company, the MD was called mark smith (i've changed the actual name but bear with me) and everyone just called him 'mark'. when he left, his replacement was his close friend, who referred to him as 'smithy', so some people switched to 'smithy' when talking about him, which i found a bit creepy.
I don't know how or when it happened, but 'to do' lists or actions are now being referred to as "punch lists" in my place.