It is the new word for lol, but its only when its a super duper lolingmoment in which you say kiwi ... or if u feel like it.
"Can you remember miss renow falling over in the classroom, lol"
"OMG THAT WAS SOOO FUNNY SHE SKATEBOARDED ON THE FOLDER KIWI!!"
":L Everytime i go into the history room i just laugh lol"