packing iron
You're hiding a gun like it's a secret. It could be a tiny gun, a big gun, or a gun that shoots like a superhero. People ask you if you're packing, but no one ever says they're packing iron. If you do say yes, you're either a gangsta, a punk, or you're about to get shot.
Text: 'She said she wasn't packing, but when she pulled out the gun, I knew she was lying.'
DM: 'I'm packing iron and I'm not even dressed up for it.'
Tweet: 'He walked into the room like he owned it. He was packing iron and he did own it.'