This word originated from the abreviation :
ROFL = Roll On Floor Laughing.
Which is a term widely used in internet chatrooms and instant messaging software.
Roffle evolved due to people readling ROFL like a normal word rather than spelling out each letter as R. O. F. L.
Roffle is therefore the casual friendly way to say ROFL and can be used as a verb in its own right:
Often used in a tongue-in-cheek way, roffle means to be in hysterics. It comes from the internet acronym ROFL, which stands for rolling on the floorlaughing. Similar to lollers.
"Oh my god, that show was so funny. I roffled for about 10 minutes when he made that joke about the fat guy."
"Ess Tee Eff Yoo"
A rare but fun sexual favor in which one person sits on a waffle iron (on or off depending on preference) long enough to get waffle marks on their ass cheeks. After this anywhere from one to five guys beat off on the person's "waffle ass", making what looks like an ass waffle with jizz syrup. Hence, the roffle.
Matt is happy because his girlfriend's flabby ass is perfect for the roffle.
Similar to lamow, roffle is the spoken version of ROFL pronouced similar to waffle. It can also be used in msn conversations or on forums so that you are not seen as an uber retard who uses LOL, rofl or lmao trying to seem cool. Roffle can be used both as a cast away comment when someone says something that's not amusing enough to laugh so roffle can be used to disregard the comment, OR can be used to add to the humour by saying roffle in a loud voice during a pause in a joke or laugh or at another inappropriate time.