低三下四 [- sān xià sì]①(卑贱的) humble; degrading; lowly; mean ②(谄媚奉承; 奴颜卑膝; 低人一等) servile; cringing; obsequious; at sb.'s beck and call; take oneself down 3 or 4 pegs：
•¶ 坚强、自信的郭振山永远也不会向人低三下四啊! Stubborn, self-confident Guo Zhenshan has never gone crawling to anyone.