Bullshit Useless Thing. Almost everything advertised on The Shopping Channel. Other things that might fall into the BUT category are anti-aging products (you can't stop the aging process), 6 Second Abs, and social networking sites like Twitter. Taken from the Anti-Flag song "One Trillion Dollars".

A word used to delay the inevitable

used as a greeting in parts of south wales(espescially beddau llantwit and ponty,it is meant to mean mate.

Something said to imply the before sentance wasn't worth saying!

the most hurtful word used to break a heart and just to destroy your being

The new over-used but not yet killed use of the original meaning of "but". Used to start short statements with the intention of emphasizing ones point on a particular topic.
Usually said very quickly so it sounds like a mumble, and is recipricated by another sentence beginning with "but", this goes on back and forth for quite a while un till someone decides to say "i know".

"But i am"
"But he is"
"But its not"
"But i cant"
"But they do"
"But i will"
"But we must"
"But i know"
"But you did"
etc....

everything i just said was a lie.

Having resorted to the word but in any circumstance whatsoever, it must be acknowledged that your failings will close-in like concrete shoes.