Sarky is a British slang term used to describe someone who is sarcastic. However, there are many synonyms for the word sarky that can be used to express the same sentiment with a different tone or emphasis. One such synonym is snarky, which implies a sharper, more biting kind of sarcasm. Another synonym for sarky is caustic, which connotes a more acidic form of wit that can be cutting and damaging. Other synonyms that convey a similar idea include biting, cutting, sarcastic, satirical, and ironic. Depending on the context in which they are used, each of these synonyms can convey a different level of wit, humor, or criticism.