mother superior
The name of the heroin dealer in the film Trainspotting.
I'm off to see mother superior for a hit.
Mother Superior Complex
A term to describe a cultural phenomenon of female privilege when it comes to child access issues and the many ways having a womb is considered a free pass to act in abhorrent ways - including denying access to fathers. It essentially means that any decision or action taken by a woman is deemed correct and righteous (especially in regards to children) by virtue of having a capacity to give birth. Regardless of how stupid and nonsensical the decision is. It also results in other privileges too, such as reduced jail time.
She has 'mother superior complex".