1.
good-for-nothing; scoundrel; worthless person
A strong insult for someone considered useless, irresponsible, or morally worthless. Often used by frustrated family members or in dramatic contexts.
Usage
ろくでなし is a strong negative label for a person who is seen as worthless or irresponsible. It is commonly used when expressing frustration or contempt.
Etymology
From ろく (碌, meaning "satisfactory" or "decent") + でなし ("not being"). Literally "one who is not decent."
Common collocations
Similar words
ろくでもない is the adjectival form meaning "worthless" or "no good" and is more commonly used as a modifier. ごくつぶし also means a useless person, particularly someone who eats without contributing.
Related Words
Related:
ろくでもない (good-for-nothing)