When you want someone to leave you alone or go away, there are many synonyms for the phrase "bug off." Alternatives include "get lost," "beat it," "scram," "buzz off," "shoo," "move along," "go away," "depart," "leave me be," "take a hike," "vamoose," and "skedaddle." Any of these phrases can be used to assertively request that someone gives you space or stops bothering you. Some might be more appropriate in certain situations, such as "leave me be" being more polite than "buzz off," while "get lost" can be more harsh than "shoo." Ultimately, the choice depends on the tone and context of your communication.