Slick wristed

Someone who is good at writing is slick wristed. Also someone who writes a lot of checks or wears expensive jewelry (mostly watches) on their wrist.

I’m a slick wristed unassisted lyricist, kid.

Oak

Something or someone that is reliable or doesn’t need to be worried about.

Aren’t you worried about your girl talking to that guy? Nah, she’s oak.

I just bought a used car. It’s an older model but it’s pretty oak.

Pronounced the same as oak tree