I'm gonna steal that one, but I'll be polite, and change it to, "Horse's Patoot!!!", which she will then crash into, following her hand signal.
That’s actually better! Much better! But don’t use “patoot”. Go for the gusto.
I live next door to a social justice warrior. You know the type. Always offended. Always angry about something. Yesterday I was sitting on my front porch when she rode past me on her bicycle. “Horse’s ass!” I yelled. She scowled and gave me the finger.
Then she ran straight into the back of a horse. Goodness knows I tried to warn her.