Ails is a verb meaning to cause trouble or distress. It is often used in the phrase 'AILS someone', which means to cause them difficulty or distress. This phrase can be used to describe any situation where someone is causing trouble or distress to another person, such as bullying, harassment, or other forms of mistreatment. AILS can also be used to describe a situation where someone is causing trouble or distress to themselves, such as through self-destructive behavior.