F18k
F18k means Fuck and the reason of using 18 cuz fuck always are not allowed to say in school except university, 18 always are study in university.
TapJFan: Fuck!
JFan: why the F18k u said dat!? U will get rekt by teachers!! M8!!1!1!!1!1!
JFan: why the F18k u said dat!? U will get rekt by teachers!! M8!!1!1!!1!1!