shavetail

[sheyv-teyl]

noun Slang.

U.S. Army. a second lieutenant.
a young, newly broken mule.

Origin of shavetail

1840–50, Americanism; shave + tail1; orig. in reference to unbroken army mules, whose tails were shaved for identification
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019