sob story

US /ˈsɑːb ˌstɔː.ri/
UK /ˈsɑːb ˌstɔː.ri/
"sob story" picture
1.

a story told to gain sympathy or to manipulate someone emotionally

:
He always comes up with a sob story when he needs money.
I'm tired of hearing your sob story every time you mess up.