Nông Nghĩa is a name of a notorious Facebook user who tells extremely tasteless, anti-fun jokes. He jokes as he lives, insipidly and ignorantly. Hence the meaning of the
slang, you can use ''Nông Nghĩa'' to describe a joke, or a
person that is not, and extremely not
funny which tries to be so. Sometimes, it can be shortened as acronyms like ''2N'' or ''NN''.
Nông Nghĩa can be referred as either a noun or an adjective.