Put 20" rims, most commomly referred to as "dubs" or "d's", on your car/truck.

When you eat dirt for the first time and leave your family to build a shack in the woods

popularized by the kanye remix of richboy.
simply put d's refer to d-cup size titties.

1. v. phrase

To engage in a dialogue or discussion with the intention of reaching a mutual understanding.

2. v. phrase

An argument used to persuade a teacher to change a failing grade to a passing one based on the student's exceptional past performance, sincere effort, and rigorous coursework.

in the song, report card by sojula boy. Means you got bad grades so you want the teacher to throw some D's on your report card.