A racecuck is a person with an obsession with another race and does everything they can to lift them above their own, usually it is seen with black people. They hate themselves and buy into white supremacy bullshit that lurks on social media.
During fellatio her two front teeth rub against the shaft thus leaving racetracks on your penis. Painful. Very common from girls who are inexperienced and/or have dialups.
Racetrack underwear are boxers or tighty whiteys that have many skid marks and burn outs on them. Skid marks being shit stains that are shaped like a car track due to the action of the butt crack gouging the stain into the unerware. Burnouts refer to the holes in underware that the cause of remains a mystery to this very day.
My wife wouldn't sleep with me last night because she was tired of having to deal with my racetrack underwearall the time. I told her if she would stop buying the sams club brand tp then maybe it would not be so severe but she doesn't listen.