The term "most law abiding" refers to someone who follows all laws and rules in a particular place or society. The antonyms of this term would be "least law abiding" or "most lawless." The opposite of a law-abiding citizen is someone who frequently breaks rules, disobeys laws, and engages in criminal activities. Such individuals may be considered as "delinquents" or "outlaws." They can be a threat to the safety and security of society, and must be dealt with by law enforcement authorities. In conclusion, being law-abiding is crucial to maintain social order and stability, and individuals who violate laws must be held accountable for their actions.