wug

Etymology 1
Pseudoword, as a word that children taking the test would not have heard before.

Noun
(plural chiefly wugs; see usage notes)


 * 1)  An imaginary creature resembling a bird, used in the  to investigate the acquisition of the plural form in English-speaking children.

Usage notes

 * In the original result of the Wug Test, children consistently produced wugs for the plural. However, plurals other than the standard wugs are sometimes used humorously, including wuggen (by analogy with ), weeg, and wuggi (by analogy with Latinate plurals).
 * Other humorous forms include weese, wüge, nyug or wugim which are formed with the plural markers of other languages.

Etymology 2
.

Noun

 * 1)  In folk taxonomy, a creature with worm or insect features; colloquially, a bug or creepy-crawly.