sit–in 
/ˈsɪtˌɪn/ noun
plural sit–ins /ˈsɪtˌɪn/ noun [count] : a strike or protest in which people sit or stay in a place and refuse to leave until they are given what they demand
▪ The activists staged a sit-in at the State House to protest the treatment of prisoners.
▪ The activists staged a sit-in at the State House to protest the treatment of prisoners.
