(baseball) back-to-back home runs

Short for 蔓延防止等重点措置 (man'en bōshi-tō jūten sochi, “important measures for the prevention of spread and other matters”).

paperweight / (computing slang, figuratively) brick (an electronic device, especially a heavy box-shaped one, that has become non-functional or obsolete)

disillusionment with, loss of interest in / independence, separation from