Are questions which ask solely about the origin of a phrase such as this https://workplace.stackexchange.com/questions/32963/what-is-the-origin-of-phrase-breaking-down-silos considered on-topic?
By itself the question is off topic here. I can see a question that asks "What does this phrase mean and where did it come from?" In that case it is on topic because it is about navigating the work place.
My coworkers keep saying to give them the pickle.(them being our customers) what does that mean and where does that saying come from?
Then an answer with links to this site and explaining what it means would make sense and be on topic.