A fork of Rural Dictionary
“Peanut butter inside” is a saying the rappers often use in songs, (Kendrick Lamar, Swae Lee) discribing that the inside of their car is brown or a brownish color. The car is Peanut butter inside.
Tanner: “hello friend, what color is the inside of your car?” Trevontarious: “mannnnnn... that bihhhh peanut butter inside!” (defined by Luke and Nick)
Referring to a womans genitalia
“ yo how was that pussy last night” “My nigga she had the peanut butter insides”