Grillz

This song is about the cosmetic dentistry that many rappers get to show off their wealth. This dental work is called a "Grill" because it makes their mouth resemble the grill of a car. Grills became popular among the "Dirty South" rappers in the '90s.

A breakdown of some of the lyrical references:
"I'm changin' grillz everyday, like Jay change clothes" - Jay-Z's 2003 track "Change Clothes.

"VVS studded, you can tell when they cut it" - a high quality diamond (Very, Very Slightly Included)

"Poten' oil" - poten' - A drink popularized in Houston made from cough syrup.

"Call me George Foreman 'cause I'm sellin' everybody grillz" - Former boxing champ George Foreman endorsed a line of indoor cooking grills.

"You can catch me in my Too Short drop" - The rapper Too Short's 1995 song "Top Down."

"Got a Bill in my mouth like I'm Hillary Rodham" - Hillary Rodham Clinton and her husband Bill Clinton.

'Tippin' on some 4's" - Mike Jones' 2005 song "Still Tippin.'"

The song features Paul Wall and Ali & Gipp and was produced by Jermaine Dupri.