sar ‧ cas ‧ tic /sɑːˈkæstɪk $ sɑːr-/ BrE AmE adjective
saying things that are the opposite of what you mean, in order to make an unkind joke or to show that you are annoyed:
Was she being sarcastic?
sarcastic remark/comment/question
He can’t help making sarcastic comments.
sarcastic manner/smile/laugh etc
‘I thought so,’ she said with a sarcastic smile.
—sarcastically /-kli/ adverb