The phrase "wise off" is commonly used to describe someone who is being impertinent, disrespectful, or showing off their intelligence or knowledge in a rude manner. There are several synonyms that can be used in place of "wise off" including being cheeky, sassy, insolent, impudent, or snarky. These words can convey the same meaning as "wise off" but may be used in different contexts. It is important to choose the right synonym that fits the tone of the conversation or situation. Using these synonyms correctly can help to convey the intended meaning while still being emphatic in speech.