FBNR 

FUCK BITCHES NO RUBBERS

essentially an acronym that encourages fornication with relatively unknown members of the opposite sex without any form of contraception.

While it may appear somewhat immature, and extremely hazardous to one's health (contingent on sexual preferences), it reflects an impartial attitude only to be had by college kids who cannot afford condoms.

Dan: " dude i totally railed like 3 girls last night, i forgot my codoms at home but whatever"

Matt:" yeahhh *nods head* FBNR"

FBNR by Aberhood111 February 16, 2009

FBNRL 

Funny But Not Really Laughing, an abbreviation created by Dr. Heinz Doofenshmirtz from the television show Phineas and Ferb
A replacement for LOL when you find something funny but not enough to laugh.

A:Why did the dinsouraur cross the road
B:Because chickens haven't evoled yet
B:FBNRL

FBNRL by MonkiMan March 14, 2013