underoccupancy charge
noun [ S ] UK uk/ʌn.dəˈrɒk.jə.pən.si ˌtʃɑːdʒ/ us/ˌʌn.dɚˈɑː.kjə.pən.si ˌtʃɑːrdʒ/
（英国的）闲置卧房补贴裁减（英国政府2012年出台的一项政策，居住在政府福利房中的人士，如被认为卧室数量超出需要，其获得的住房补贴将被减少）
the official name for a UK government policy introduced in 2012 that reduced the amount of housing benefit (= money to help poorer people pay their rent) paid to people living in houses that were considered to have more bedrooms than they needed
Compare: bedroom tax