Verb - When you are mistakingly attracted to someone's profile pic, and realize upon the opening of the album that the person is not exactly what was portrayed in the default.
"Wow, CuTegIrL123 looked fine in her main pic, but when I opened her album she totally had to be backspaced!"
get deleted or ignored
I had the whole line written but it was accidentally back spaced.
She's a bitch. And hence, she's got backspaced from the party.