A phrase used to imitate a person who has just spoken. By saying it at someone, you'll feel and look better than the person you are "correcting".
But the phrase can also be good. Such as, you just finished making something that has never been made before. Then, another person uses assholish
sarcasm to comment on your creation. The person insulting you is
right to
insult you because you didn't seem that excited about your creation.
An example of assholish
sarcasm as being used by Person B.
Person A: *just finished making a gun out of
paper* "Wow, pretty cool"
Person B: "Yeah it's pretty cool, it's nothing you know. I just finished making a gun out of
paper, nothing too fancy you know."