When someone says something sarcastically, they say the opposite of what they really mean, often to be funny or to show that they are not happy.
Saying something sarcastically can make people feel like the speaker is not serious or is making fun of something.
Examples:
She said 'great job' sarcastically after I dropped the plate.
He sarcastically thanked me for waking him up early.
I love doing chores, she said sarcastically.
Oh, I just love getting rained on, he said sarcastically.
I'm so excited to clean my room, she said sarcastically.
He said 'I can't wait to do more homework' sarcastically.