a horse that bucks habitually, esp. such a horse kept for use in rodeos
Word origin
[1840–50; buckjump + -er1]This word is first recorded in the period 1840–50. Other words that entered Englishat around the same time include: bypass, colloid, organizer, pylon, warmup-er is a suffix used in forming nouns designating persons from the object of their occupationor labor (hatter; tiler; tinner; moonshiner), or from their place of origin or abode (Icelander; southerner; villager), or designating either persons or things from some special characteristic or circumstance(six-footer; three-master; teetotaler; fiver; tenner)