armsup in 'arms (about/over sth) (informal)1.■very angry and protesting very strongly (about sth) 强烈抗议；极力反对:Local residents are up in arms over plans to build a new motorway. 当地居民极力反对新建一条高速公路的计划。2.■a babe in arms 另见babe3.■fold sb in your arms 另见fold4.■lay down your arms 另见lay5.■throw up your arms/hands in despair, horror, etc. 另见throw6.■with open arms 另见open