Большой китайско-русский словарь
ruǎnjiǎoxiè
Wuss, wussy, chicken. Literally “soft-legged crab.” Originated in Suzhou, where crab legs are a popular food and strong legs with lots of meat are, obviously, preferred over soft legs with no meat. Mostly used in the South. Northerners do not use the term but do understand its meaning when they hear it.