blue in the face 英 [blu: in ðə feis] 美 [blu ɪn ði fes] [释义]脸色发青，(气得、累得)说不出话来; 脸红脖子粗; [网络]脸色铁青; 筋疲力尽; 脸上发紫; [例句]He was blue in the face, ie His face was a purplish colour because of cold or exertion. 他脸色发青(因寒冷或用力过度而稍泛紫色).
是精疲力尽的样子，非常非常的累的意思
筋疲力尽是对的
精疲力尽
精疲力尽。