An acronym standing for "That Was Amusing" instead of "LOL." The word "TWA" depicts what really occurs in the typer's mind, as rarely do people actually laugh out loud when they say "LOL." Originally used by Tom and his less amusing sister. As of now, it's not used in widespread manners.
"What's the difference between a pizza and a Jew?"
"I don't know, what?"
"A pizza doesn't scream when it's in the oven."