1. Members of a motorcycle gang or club, especially one associated with criminal activity or a rebellious lifestyle.
Usage: informal; chiefly Australian and New Zealand English; plural form; singular is 'bikie'

Examples

• The bikies rode their motorcycles through the city streets.
• Local authorities increased patrols after reports of bikies gathering at the bar.
• The documentary explored the culture and history of bikies in Australia.
• Several bikies were arrested during the police raid.
• The neighborhood was wary of the bikies who had recently moved into the area.