Sarcasm is a form of irony that communicates a message in a way that is opposite to its literal meaning. A sarcastic tweet is a message that is intended to be humorous, but with a negative undertone. There are various synonyms to describe a sarcastic tweet, such as a snarky tweet, a caustic tweet, a sardonic tweet, a biting tweet, and a mocking tweet. All of these words have connotations of bitterness, irony, and scorn, which are commonly used in sarcastic tweets. Regardless of the synonym used, a sarcastic tweet is a powerful tool for expressing one's thoughts and opinions in a humorous and sarcastic way.