What's the meaning of "punch line"?
What's the meaning of "punch line"? does it have any meaning like" the most important part of article or speech"?

Question

Answer

It is the part of a joke that is supposed to trigger laughter.  For every good joke (in theory) there is a set-up and a punch line.  A good set-up builds the joke up like blowing up a balloon and the punch line is like popping the balloon with a pin.

For example, SET-UP:  "I asked my wife where she wants to go for our next vacation."   She said, "Somewhere I've never been to before."

PUNCH LINE:  I thought for a minute and said, "How about the kitchen?"

Answer

It is the last few words of a joke or a story , that make it funny or surprising.

Answer

The part of a joke that makes it funny.