an 'illegal alien/immigrant' [=a foreign person who is living in a country without having official permission to live there]
The campaign was accused of many fund-raising 'illegalities'. [=illegal activities]
In this state, it is 'illegal' for anyone under the age of 21 to drink alcohol.
(..) Well then technically you're unemployed. Where's Loki's scepter? Don't worry, I know when I'm beat. You'll mention how I cooperated, I hope. I'll put it right under illegal human experimentation. How many are there? We have a second enhanced. Female. Do not engage. Uuuuh...! (..)2015 Avengers: Age of Ultron