Noun
(slang, mildly vulgar) bird excrement
Synonym: birdshit
(slang, mildly vulgar) bullshit; something fallacious
“It's just a bunch of birdcrap. What's it got to do with Mark Doukas getting whacked?” “I don't know,” I admitted. But deep down I had a feeling there might be a connection. (The Alpine Advocate: An Emma Lord Mystery, page 87, by Mary Daheim, 2010[1])