guppy

/ˈɡʌpi/

IPA: /G AH1 P IY0/

noun
  1. 1

    A tiny freshwater fish, Poecilia reticulata, popular in home aquariums, that usually has a plain body and black or dark blue tail for the females and a more colorful tail for the males.

    Fred kept a tank of guppies by the windowsill.

  2. 2

    By extension, any tiny fish.

  3. 3

    A tube holding paintballs before they are loaded into the gun.

    2001, John R. Little, Curtis Wong, Ultimate Paintball Field Guide (page 177)

Source: https://en.wiktionary.org/wiki/guppy