noun

1. pl. bucks or buck a male deer, antelope, goat, rabbit, etc.
2. ☆ the act of bucking
3. 1. buckskin
   2. casual oxford shoes, originally of buckskin, now usually of light-colored suede, nubuck, etc.
4. Informal a young man, esp. one who is bold, lively, vigorous, etc.: sometimes a contemptuous or patronizing term as applied to a young black or North American Indian man
5. Archaic a fop or dandy

Etymology: ME bukke < OE bucca, male goat < IE base *bhuĝo- > Ger bock, Du bok, Ir boc

intransitive verb

1. ☆ to rear upward quickly and descend with the back arched and forelegs stiff, as in an attempt to throw off a rider: said of a horse, mule, etc.
2. to plunge forward with lowered head, as a goat
3. ☆ Informal to resist something as if plunging against it
4. ☆ Informal to move jerkily: said as of a car

transitive verb

1. ☆ to dislodge or throw by bucking
2. ☆ Informal to resist stubbornly

adjective

1. male
2. ☆ of the lowest military rating buck private, buck sergeant