Kick the bucket: euphemism meaning to die.
Origin: the source of this expression is unclear, some people believe I comes from a beam from which an animal is hung just before it is slaughtered.
Last year my friend David had a heart attack and kicked the bucket.
I cannot continue with this blog because my computer kicked the bucket (it cannot be fixed).
Butter up: meaning to flatter someone.
Origin: the source of this expression is from India where they used to throw butter balls at statues of the Gods when they wanted favours.
Yesterday I told my boss that he had a very nice suit on and that the colour blue really suited him. I was buttering him up so that I could ask for a raise.