Lol Sandwich

A process on instant messenging by which a person can say or admit terrible things to his interlocutor while avoiding an immediate reaction.

Todd says : Yeh that was a great party !
"beginning of Lol sandwich"
Todd says : lol
Todd says : Hey, you know i kissed your girlfriend that night !
Todd says : lol
"End of lol sandwich"
Fred says : Yeh ! lol
Fred says : What... ?