Definition of "buck"
buck1
noun
plural bucks
(US) An uncastrated sheep, a ram.
An implement the body of which is likened to a male sheep’s body due maintaining a stiff-legged position as if by stubbornness.
(dated) An object of various types, placed on a table to indicate turn or status; such as a brass object, placed in rotation on a US Navy wardroom dining table to indicate which officer is to be served first, or an item passed around a poker table indicating the dealer or placed in the pot to remind the winner of some privilege or obligation when his or her turn to deal next comes.
(by extension in the US, in certain metaphors or phrases) Blame; responsibility; scapegoating; finger-pointing.
buck2
verb
third-person singular simple present bucks, present participle bucking, simple past and past participle bucked
buck4
verb
third-person singular simple present bucks, present participle bucking, simple past and past participle bucked