a real mother
A real mother is someone who has been through the dirt and knows how to make you suffer. They’re like a man who’s been through hell and came back for revenge.
'That guy’s a real mother, he’s been through more than you and me combined.'
'She’s a real mother, and she doesn’t take any crap from anyone.'
'He’s a real mother, and if you mess with him, you’re going to pay for it.'