My vote goes to 'lying.' I hear bull-shit every morning at the local coffee shops in my home town. There's this one individual that tells such stories that I told him in the presence of others that he should be a writer for Disney productions. The fellows just laugh about it.
Why do some people like to shoot the bull? For one, to be a part of the discussion or to be the center of attention.
Now, take the case of my late older brother, he was an out right liar! He was a con-man. Like the BShitter he too craved attention. A person of this nature when he tells you something, there's no questions whether he's telling the truth or not, whereas, the crap-shooter their words are ????able. Mixing lies with truths in story telling is the order of the day.
This is my short version, more bull later.
Golf