To be subservient to whites. To exhibit behavior that diminishes self worth to gain the favor of white people.
When John's white friends complain about the unruly urban teens at the mall, he also adds similar comments and grins in agreement like some "butter biscuit eating" plantation slave.
Instead of a soggy biscuit wherein a group of people stand in a circle and cum onto a biscuit, then the last person to cum eats the biscuit, a better biscuit is when you cum into a girls mouth and then shove a biscuit into it.
Damn girl, let’s get some KFC so I can give you a better biscuit.