Sarcasm- The use of irony to mock or convey contempt
or in other words
To reply back to someone with a smart remark!
I use sarcasm a lot because there are a lot of people that ask the most stupidest questions, especially when they know the answer.
Example
Person-How old are
Me-An age
Like why you asking...I didn't ask you so don't ask me I don't want to be your friend!