Hey I've come up with

[Laharl]

It's an accronym that decribes exactly what you are doing when somethin humurous happens.

IFBINLOL

Ironically
Funny
But
I'm
Not
Laughing
Out
Loud

you can ommit the last OL and it would still make sense!

I should win a prize xD

 

[Divine Dragoon]

Umm... okay?

 

[Relient A]

it seems like I've seen that before...

yshml - you should hear me laughing

 

[Taylor Swift]

oooo i got one

WTCTRG = Wow this chicken taster really good....^^