[QuercusMax]

Yes, your goal isn't to shave a yak, it's to do something else, but you have endless side quests including being a yak barber.

[karomancer]

Yes I've heard this too, but I've also heard both.

While writing this I found a lot of opposing definitions (as mentioned with bus factor). I've also heard "Don't shave the yak!" as part of the definition you gave for yak shaving.

Thanks for the feedback! I'll incorporate this too to make it more complete.