kuà xià zhī rǔ
lit. the humiliation of having to crawl between the legs of one's adversary (as Han Xin 韓信|韩信[Han2 Xin4] supposedly did rather than engage in a sword fight) (idiom)
fig. (endure) utter humiliation
胯
kuà
crotch
下
xià
down
之
zhī
(possessive particle, literary equivalent of 的[de5])
辱
rǔ
disgrace