Swagga Like Us Paper Trail T.I.

I rock Roc jeans 'cause my knots so thick

I wear Roca Wear brand dungarees to accomodate the large roll of cash I carry with me. They have larger than average pockets and are good for this task.
"Knot" is a slang term used for a roll of money. Rockawear jeans are bigger and baggier than skinny jeans so he needs them because his roll of money is so thick