An FRF is a front row faggot. These are the people in class that sit in the first row asking question upon question, primarily to act intelligent and/or point out mistakes the professor has made. An FRF is typically oblivious to the disdain of his or her classmates.
FRF: Professor, it says to always remember Euller's constant when integrating. Is this the same as Euler's constant?
Not commonly seen, can be found when someone mis-spells "lol" to become "kik" (the letters directly left of it), then "juj", "hyh","gtg", and eventually FRF.
Direct typo of "gtg".
Front Row Fucker
or as teachers know it, Front Row Fans...
Person 1: Are you going to the basketball game?
Person 2: Heck yeah! The FRF is gonna get crazzzyyy!