time off in lieu
noun [ U ] business UK specialized uk/ˌtaɪm ɒf ɪn ˈljuː/ us/ˌtaɪm ɑːf ɪn ˈluː/ (abbreviation TOIL); (US compensatory time off)
（因超时工作而获得）补假
time that an employee who has worked extra hours may take off from work
Where eligible members of staff have worked agreed additional hours above their normal working week, the University offers time off in lieu. 当有资格的员工在每周规定的工作时间之外，经过同意又花了额外的时间在工作上时，大学会给他们补假。