Synonym: jump, leap, spring, vault. Antonym: hind. Similar words: bucket, duck, suck, tuck, fuck, truck, fucking. Meaning: [bʌk] 
n. 1. a gymnastic horse without pommels and with one end elongated; used lengthwise for vaulting 2. a piece of paper money worth one dollar 3. United States author whose novels drew on her experiences as a missionary in China (1892-1973) 4. a framework for holding wood that is being sawed 5. mature male of various mammals (especially deer or antelope). v. 1. to strive with determination 2. resist 3. move quickly and violently 4. jump vertically, with legs stiff and back arched.
n. 1. a gymnastic horse without pommels and with one end elongated; used lengthwise for vaulting 2. a piece of paper money worth one dollar 3. United States author whose novels drew on her experiences as a missionary in China (1892-1973) 4. a framework for holding wood that is being sawed 5. mature male of various mammals (especially deer or antelope). v. 1. to strive with determination 2. resist 3. move quickly and violently 4. jump vertically, with legs stiff and back arched. 
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1. Buck up! We'll be late.
2. If you don't buck up, we'll be late.
3. Oh, buck up for heaven's sake, Anthony! I'm sick of looking at your miserable face.
4. Anything anybody said to him to try and buck him up wouldn't sink in.
5. Buck never allowed himself to be bullied into doing anything that went against his principles.
6. Come on, buck up, things aren't that bad!
7. Buck up! There's no school tomorrow!
8. I was tempted to pass the buck .
9. It's no use trying to buck the system.
10. He admired her willingness to buck the system .
11. Buck up, John! We'll be late.
12. Are taxpayers getting enough bang for their buck?
13. A holiday will buck her up.
14. You need something to buck you up.
15. A day out will buck you up.
16. He is a buck private.
17. The sergeant was degraded to buck private.
18. It was my decision. The buck stops here .
19. The buck stops firmly with the boss.
20. Buck up, Tom,(sentencedict.com) or you'll be late for school!
21. Let's try to buck the losers up.
22. One or two companies have managed to buck the trend of the recession.
23. You'd better buck up your ideas if you want to pass the exam.
24. He knew that with a change of scene he would soon buck up.
25. His boy bent curiously to the skeleton of the buck.
26. The boy bent curiously to the skeleton of the buck.
27. They were just in it to make a quick buck.
28. David says the responsibility is Mr Smith's and it's no good trying to pass the buck.
28. Wish you will love sentencedict.com and make progress everyday!
29. The movie is about a group of men trying to make a buck as male strippers.
30. I think it's very important for those governments to do whatever they can to get a bigger bang for the buck.