describes something that is so bad that you don't want to keep watching or following but you just can't look away from it.

A stupid person; it refers to the lack of surface area on an individual's brain. The general thought is that the more surface area (wrinkles, creases, etc.) a brain has, the smarter the person is. Conversely, a person with a smooth brain (no wrinkles) has less surface area and would therefore be stupid.

a total fucking disaster ...the kind that makes you want to shake your head.

What the whole world is currently experiencing for 366 days straight.

A person or situation that can't escape an inevitable bad outcome; hence, a trainwreck.

A disaster that is foreseeable but unavoidable,
disastrous yet inevitable,
distasteful, but morbidly fascinating.
You don't want to stare,
but you just can't look away.
~.Trainwreck.~

A name used to describe a clumsy, dangerous person. This person will damage things and hurt people(on accident or on purpose). They also take things too far. Rumors are also spreading about a trainwreck virus that causes these symptoms.