Bullshit (also selmo, bullplop, bullbutter, bovine stool) is a common English language expletive. It can be used also as an interjection or as many other parts of speech. Usually, it is a noun, verb or interjection that describes a lie. It shows that someone is trying to deceive, e.g. "Stop bullshitting me" ("Don't try to deceive me. I know what you are saying is a lie."). 
References[change | change source]
- "Definition of BULLSHIT". www.merriam-webster.com. Retrieved 2020-05-27.