buck

ot noun

1. A dollar (one hundred cents). Can I borrow five bucks?
2. (by extension) Money. Corporations will do anything to make a buck.
3. One hundred. That skinny guy? C'mon, he can't weigh more than a buck and a quarter [125 pounds].
4. (in certain metaphors or phrases) Blame; responsibility; scapegoating; finger-pointing. pass the buck

fe’l verb

1. (by extension) To resist obstinately; oppose or object strongly. The vice president bucked at the board's latest solution.
2. (by extension) To move or operate in a sharp, jerking, or uneven manner. The motor bucked and sputtered before dying completely.
3. (by extension) To overcome or shed (e.g., an impediment or expectation), in pursuit of a goal; to force a way through despite (an obstacle); to resist or proceed against. John is really bucking the odds on that risky business venture. He's doing quite well.
4. To copulate, as bucks and does.