be up to one's neck in sth 忙得不可开交
I've been really up to my neck in my work recently, so I didn't really have much time to watch shows.
rich second generation 富二代
Fuerdai, which literally means rich second generation, is a Chinese term that refers to children of nouveau riche wealthy families.
富二代，字面翻译是rich second generation，是一个中文名词，指的是富裕家庭的子女。