That's really funny
trf is used to replace "lol" because no one actually laughs out loud when they use "lol"

an awesome fictional digital world somewhere in a far far away circuit, ruled by the Mighty Penguin, where different sectors are run by blood-thirty ModBots, noobs get trolled, the geeks spend fun times and trolls get punished by the power of the Ban-Hammah

Tuned Radio Frequency (see radio)