Verb
The word is derived from bullshit
Whenever you hear the phrase zero tolerance, remember, someone is bullshitting you. George Carlin
When I heard really that Otis Redding had crashed into that sea, that’s my main man— nah, just bullshitting. Source: Internet
Hopefully by now you’ve had one of those late-night conversations fueled by exhaustion, elation, fear or drugs in which you and your friends finally admit you are all bullshitting each other. Source: Internet
Brown may or may not be telling the truth, but you are quite obviously bullshitting here. Source: Internet