>> Solution:
>> - stand the F up on every meeting where you hear BS, and call "shenanigans"!.
Great way to get yourself sidelined in the near future, and not being able to intervene when it will be your job to implement a fantasy...
The problem with being honest in a situation like this is, that it will disrupt everyone in that meeting, not just the bullshitter. You'll be perceived as a fire starter and the next meeting will likely take place without you -- organizations at a certain size can be very flexible this way. Or worse: They retaliate. Bullshitters are usually good at manipulating peoples perceptions. Once they feel threatened, they are likely to respond (in a way, you'll probably lose, since they can dictate the turf and the weapons).
A way I found to deal with a situation like this is: Try to gouge the impressions of the other participants of the meeting -- cigarette breaks are perfect for this kind of "talk in private". Try to figure out if they also found this or that aspect of the meeting a bit odd. If it is so (and it very likely is) call out the BS for what it is, but don't be too bold about it and focus on one - two key aspects, not more.
You are usually not alone in your perception of bullshittery and others are probably aware of it in one way or another. It can be a real eye-opener to them that they are not alone in thinking that, was was talked about before was a bit... exaggerated. Once they are aware they might percieve this notion in other aspects of the work of said bullshitter and it gets harder for them to get away with it.
I have to say, I have only limited experience with roles in higher management. Usally the higher up the food-chain, the better the bullshitters and the better the strategies and tactics of them -- it might not work that way when you are up against a hierarchy of self-proclaimed experts. But in smaller organizations and "everyday"-meeting that are somewhere "near production", this is a valid tactic, that has never failed me thus far.
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Gosh how I hate this form of office-politics...