Someone who is antisocial tends to have the some of – if not most/all of in the case of those with Antisocial Personality Disorder – the following characteristics/symptoms: no regard for what’s morally right nor wrong, they can lie or be deceitful typically for the purpose to exploit others, noted to be manipulative of others usually for personal gain or simply for personal pleasure, egocentric, displaying a sense of superiority, they usually have recurring troubles with the law, habitually violate the rights of others by the use of intimidation, dishonesty – manipulation, lying, deceit – and misrepresentation, may commit child abuse or neglect, may be hostile, significantly irritable, easily agitated, impulsive, aggressive or violent, universal lack of empathy and remorse for others, they take unnecessary risks or partake in dangerous behaviors, may be in poor or abusive relationships usually dictated by them and prior mentioned symptoms, may partake in irresponsible behavior at work, and a consistent failure to learn from or disregard for the negative consequences of behaviors they partake in.
In many notable cases of individuals with ASPD (Ted Bundy, John Wayne Gacy, Albert DeSalvo), they’re quite outgoing and charming that is until they torture, maim, kill you.
As @bolwerk said, you probably meant asocial.