casual:
(plural: ‘casuals‘; pronunciation: the letter ‘c’ is said with a ‘k’ sound as in “king”)

casuals/casual workers
a worker who is employed for a short period of time, e.g. ‘casual labour’, who does not receive any benefits,, i.e., not paid for the time he/she does not work, no paid holidays, and not allowed to join any labour unions or associations, and can be removed from service anytime;
a soldier not yet given any permanent assignment,

people in their casuals/casual wear
After being a casual for over five years, Jim was given a permanent post as a work supervisor.
Besides its regular 78 workers, Suzike car unit here hires some 25 casuals a day to do the hardest and meanest jobs.
There are strict laws on the way companies or individuals can employ casuals, but nobody seems to care for them.
