A slang term used to describe an exceptionally painful hangnail. Most commonly used among older generations in western Pennsylvania, specifically Pittsburgh.
I just got lemon juice on my stepmother and it hurts like hell!
The woman your father married after your evil, slutty mother threw him out because he refused to become a woman. The stepmother puts up with your spoiled ass and shitty treatment of both her and your father because she actually loves your father, which neither you or your fat, ugly, broke mother ever did. She's hot, educated, willing to work and actually enjoys sex - all things your mother isn't/won't/doesn't.
Being a stepmother sucks because no matter how much the kids' mother has emotionally abused them, they will always believe her when she tells them you are horrible, and so they treat you like shit, even though you support them financially and don't tell them what shitty little brats they are.