Uncountable noun meaning the act or process of wasting time
Scrolling through social media at work is just time-wasting.
Листание соцсетей на работе — это просто безделье.
Attributive adjective meaning causing or involving a waste of time
We need to eliminate time-wasting meetings from our schedule.
Нам нужно исключить бесполезные совещания из расписания.