strait-laced/ˌstreɪt ˈleɪst; `stretˌlest/ adj(derog 贬) having or showing a very strict attitude to moral questions; prim and proper （在道德问题上）极拘谨的; 一本正经的; 古板的 My old aunts are very strait-laced. 我的老姨妈都很古板.
牛津英汉双解词典