第三人称单数：shacks up 现在分词：shacking up 过去式：shacked up
1.(与人)姘居;同居
2.住下
3.过夜;宿泊
1.to live with another person as sexual partners without being married. This word often shows that you do not approve of people who do this.
2.to live or stay in a place for a short time
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