Definition of eephus in English:

eephus

noun

Baseball
  • A slow pitch that travels in a high arc.

    ‘the eephus is a challenge to throw effectively’
    as modifier ‘an eephus pitch’

Origin

1930s (originally with reference to the quality of pitching exceptionally well): origin unknown. The current meaning dates from the 1940s and is associated especially with the pitcher Truett “Rip” Sewell (1907–89) of the Pittsburgh Pirates.

Pronunciation

eephus

/ˈiːfəs/