When it comes to antonyms for the phrase "conduct properly", there are various possibilities. Instead of conducting properly, one could behave inappropriately or misbehave. This could manifest as acting rudely, disrespecting others, or being impolite. Similarly, a person could also behave erratically or irresponsibly, showing a lack of accountability or reliability. Additionally, someone may conduct themselves in an unprofessional manner, demonstrating a disregard for ethical standards or lacking a sense of decorum. Finally, the opposite of conducting oneself properly could also involve presenting oneself as disorganized, chaotic, or careless - shirking responsibility and demonstrating poor leadership skills. Ultimately, antonyms for 'conduct properly' would suggest failing to meet the standards of proper behavior and conduct.