stop up 1. 堵塞，塞住；被阻塞，不通 Stop up each breach as it occurs. 一出现裂口就要堵住。 The entrance to the cave was stopped up with rocks. 进山洞的入口被岩石堵住了。 My nose is badly stopped up. 我的鼻子塞得厉害。 The sink stops up constantly. 水斗经常堵塞。 2. 〈英口〉不睡觉，熬夜 She often stops up till he gets home. 她常常等他回家后才睡。