Ms Eminem is a stupid person who thinks beetroots grow on trees. She speaks the Eminem language and she also thinks rabbits have feathers. She has a husband who burned her child with his oven. YUM! She pronounces many words wrong and she has a tiny brain. You might see her dressed as a banana or a dead banana.
Noun: A continuous stream and or massive volume of falsehoods, misinformation and absurd arguments - often used to overwhelm a valid argument. Verb: To use such large amounts of bullshit in debate, particularly in an online debate or argument.
Because Karen could not argue against the fact that the US economy has vastly improved under President Obama, she just posted a stream of bulkshit pasted from right-wing chain mails in the hopes no one would bother to debunk it all. When Bob claimed that GMOs were not toxic as stated by a environmental blogger: he and his followers bulkshitted Bob's post to death with bullshit, misinformation and absurd arguments.