A) A phrase that seems to simply state the obvious but actually implies helplessness. B) A phrase that seems to simply state the obvious but actually means it will be what it is, as in it ain't gonna change, so deal with it or don't.. See also tough shit, oh well, cry me a river and tfb.
Find and run to your nearest escape route, whether it's behind a fence, a tree (one she cannot knock down), a large bale, a tractor or truck, anything that is large enough that will protect you and act as a barrier between you and that cow.
The cows will spend time on the feed-ground, and they will leave plenty of manure as evidence. It is best to move the feed-ground every day, to both provide a clean table for the cow's feed, and to distribute the fertilizer more evenly over the field.