n. 下体弹力护身

[ noun ]
a support for the genitals worn by men engaging in strenuous exercise
<noun.artifact>

jockstrap \jock"strap`\ (j[o^]k"str[a^]p), n.
1. A supporting undergarment for the external genitals worn
by men engaging in vigorous athletic sports or strenuous
exercise; called also {athletic supporter} and {jock}.

Syn: athletic supporter.
[WordNet 1.5]