v.1. To draw or pull something in by or as if by suction: I sucked up the soda through a straw. There was a lot of dirt on the floor, but the vacuum cleaner sucked it up quickly.
2. Slang To suppress some pain or emotion: I thought that job was beneath me, but I really needed the money, so I sucked up my pride and accepted it. I know the pain you're feeling is intense, but you have to suck it up until we get to the hospital!
3. Slang suck up to To behave obsequiously; fawn: I was unable to ask any good questions in class without my peers saying that I was sucking up to the teacher.