Definition of morrillo in English:

morrillo

(also morillo, murillo)

Pronunciation /mɒˈrɪl(j)əʊ/ /mɒˈriːjəʊ/

noun

Bullfighting
  • The muscle at the back of the bull's neck, one of the targets for the lances of the bullfighters.

Origin

1920s; earliest use found in Ernest Hemingway (1899–1961), writer. From Spanish morrillo fleshy part of the neck from morro + -illo, diminutive suffix.