Italic
sarcasm is saying a statement with a heavy sarcasm on
words such as she, he, that, not and other major words (a higher pitched voice than usual is also necessary to get full effect). It is usually used to make fun of
people, primarily in comebacks. When trying to use this style of speaking on aim, one usually puts the sarcastic word in italics or caps.
Sitting in Spanish class...
Mark: Hey
Matt you suck at Spanish.
Matt: oh YOU'VE got friends.
Mark: NOT gay
Matt: BALLS
Observers: Wow, Matt and Mark having a pretty bad italic sarcasm fight.