BFNR is a code word used in high schools. BFRN = Boner for no reason, is when you get a boner (for no specific cause). There is also BFA = Boner for ass, and is exactly what it says.
slip of the tongue perhaps,
Those idiots who drive around in a ridiculously raised pick up truck, making a top heavy vehicle even more top heavy and unstable
A:*gah*
B: "Whats the matter"
A: This dam prickup is blinding me.
B: Stupid thing's, as if there lights weren't blinding enough as it is.