Not according to, or authorized by, law; specif., contrary to, or in violation of, human law; unlawful; illicit; hence, immoral; as, an illegal act; illegal trade; illegal love.
If it's illegal to rock and roll, throw my ass in jail! Kurt Cobain
If voting changed anything, they'd make it illegal. Emma Goldman
A tyrant must put on the appearance of uncommon devotion to religion. Subjects are less apprehensive of illegal treatment from a ruler whom they consider god-fearing and pious. On the other hand, they do less easily move against him, believing that he has the gods on his side. Aristotle
Ice-cream is exquisite - what a pity it isn't illegal. Voltaire
In most communities it is illegal to cry 'fire' in a crowded assembly. Should it not be considered serious international misconduct to manufacture a general war scare in an effort to achieve local political aims? Dwight D. Eisenhower