mope
verb [ I ] disapproving uk/məʊp/ us/moʊp/
（尤指因失望而）闷闷不乐，自怨自艾
to be unhappy and unwilling to think or act in a positive way, especially because of a disappointment
There's no point in sitting at home and moping - get out there and find yourself another job! 坐在家里自怨自艾有什么用——走出去再找份工作！
Phrasal verb
mope around (somewhere) （在…）没精打采地闲逛
to move from one place to another without any particular purpose or energy, because you are unhappy or disappointed
He was driving me crazy, moping around the house all day. 他整天在房子里没精打采地走来走去，快把我弄疯了。