1.A term that is used to described lies or untrue stuff.

2. A term used to describe stupid things people do.

I couldn’t care less (but one must keep up appearances, right?)

1) complete lies and made up shit

A blatant lie, a fragrant untruth, an obvious falicy.

Or, the excriment of cattle.

Most of today's media, music and movies.

1) noun. Stuff that is made up for the purpose of placating someone, or passing an exam, or getting elected to office. Most often false or ridiculous.
2) verb. To generate bullshit.
3) interjection. Accusing someone of bullshitting.
4) adjective. Identifying or suspecting something as bullshit.

In all usages, the term can be shortened to "bull" or "BS".

nonsense, lies, exaggeration.