but 

A word used to delay the inevitable

but by Anonymous July 16, 2003

but 

A word used to nullify all words preceding it in a sentence.

I don't want to be a problem but...
I'm not one to say things like this but...
I don't want to bother you but...
You know I love you but...

but by (EAK) September 7, 2013

But 

A further bastardisation of the word buddy or bud. The welsh pronounciation the word bud delivers such abruptness on the D it is magically transformed into a letter never heard before by man. It is so mysterious that all one can hear after the clear "uh" sound of the word is silence due to the incapability of the non-welsh human mind to properly process such a sound. It's closest relative is the letter 'T'. The letter 'T' is therefore acceptably substituted until the rest of the human race is at such a stage that they may understand and therefore develop a symbol for such a letter.

Hey Dave, hows it going?

Good, you alright but?

But by TheWelshman July 12, 2012

but 

everything i just said was a lie.

I love you but,there is another lover

but by mysticals January 4, 2011

but 

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

I love you but, sometimes you just kill me.

but by Schlee September 27, 2003

but 

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

walking down a street.
freind, aquaintence,total stranger walks down the other side of street.
you:arite but!
freind, aquaintence,total stranger:ai!
both walk off

but by matt March 27, 2005

but 

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

i love you BUT i think we should see other people

but by music_movie_girl January 31, 2009