get up to something phrasal verbphr v DOto do something, especially something slightly bad 干〔尤指不妥的事情〕 Go upstairs and see what the kids are getting up to. 上楼去看看孩子们在捣什么鬼。
What did you get up to at the weekend? 周末你都干了些什么？
get up to • Yet wondering what your fellow citizens got up to in the war is a barrier to any sense of community.
→ get up to something at get(PHRASAL VERB)