This stands for: Laughing even louder at you.
It is used in msn text.
Bob: Hey man, i just shat myself
John: Haha, lay
Bob: Haha, and i just had a wank.
John: lelay
by Finlay2 June 11, 2007
LELAI Abdellatif, aka LELAI, aka Samer's Ass is an Artificial Intelligence, Machine Learning, TOP secret, patent-pending algorithm on the blockchain that does some self-advertising and then shows you the black market rates of the Lebanese Lira.

Check for more info.
LELAI Abdellatif is well known for foreseeing the future and eliminating market manipulation using Google sheets.
by Samer's Ass July 16, 2020