0 using remarks that clearly mean the opposite of what you say, in order to hurt someone's feelings or to humorously criticize something: --
I was not being sarcastic about human rights.
I entirely accept that; my remarks were genuine and not meant to be sarcastic.
Whether that interjection was sarcastic or not, the thing is true.
Do not let us be too sarcastic about these beginnings of an international force.
The foreman was quite sarcastic about the defects on this type of car.
Nothing but sarcastic comments and criticisms came from these benches and from the political class while the media maintained a scornful silence.
For example, a speaker may expect an addressee to appreciate that she is being sarcastic even when the addressee cannot reasonably know that this is what the speaker intended.
As we will see in section 3, the past tense is used here for reasons of discourse tentativeness, although it may also be meant to be sarcastic.