A person who surrenders his/her life to the parent of the opposite sex. He/she has a sexual relationship with this parent, and his/her life depends on the promises of this parent.
That goodie-two-shoes is mentally incompatible to build his own family because he is so fucked up by his mother!
Someone who always does what's right and not what they're supposed to do.
"That goodie-two-shoes grassed up his own mother! The little bastard..."