A laffer is used during instant messaging conversations. It is a medium through which you define your level of laffter. Your lol is not a laff its a messenger that describes your laff. There fore it is called a lffer.
LMFAO, LMAO, LOL, ROTFL, ect.
Do you think my laffer, LOL, is too boring?
God! YOu only put LOL? I thought my joke was LMFAO worthy.