The buffalo fish (Ictiobus spp.).
A related North American animal, the American bison, Bison bison.
Any of the Old World mammals of the family Bovidae, such as the Cape buffalo, Syncerus caffer, or the water buffalo Bubalus bubalis.
A nickel.
To outwit, confuse, deceive, or intimidate.
To hunt buffalo.
The lining of the large stomach of ruminating animals, when prepared for food.
Something foolish or valueless, especially written works and popular entertainment (movies, television).
An edible lichen, especially rock tripe.
The entrails; hence, humorously or in contempt, the belly.
That (what has just been said) is untrue.