If your are being serious:
http://www.urbandictionary.com/define.php?term=lel
2l;dr
an anagram of "le," from the latin "ille" meaning "that"
and LOL, abbreviation of "Laugh Out Loud"
used to point out something is funny, but really not, and actually ridicule it. Like the old:
"Ha Ha, Only Serious"
brought by the new Derp generation