nonstandard; not conforming to rules or expectations
without symmetry, regularity, or uniformity
rough
not regular; having sides that are not equal or angles that are not equal
whose faces are not all regular polygons (or are not equally inclined to each other)
not following the regular or expected patterns of inflection in a given language
A soldier who is not a member of an official military force and who may not use regular army tactics.
One who does not regularly attend a venue.
Dissolute, licentious, profligate; loose in morals.
One who is freethinking in religious matters.
Someone (especially a man) who takes no notice of moral laws, especially those involving sexual propriety; someone loose in morals; a pleasure-seeker.
Someone freed from slavery in Ancient Rome; a freedman.