This abbreviation is commonly use in chat '' A: Age , S:Sex (M/f), L: Location (Your Country) '' Just an abbreviations Like BTW: By The Way , TYT: Take Your Time , BRB : Be right Back , ...
ESL: English as a Second Language ,...
They haven't roots In the Language , but people use them as abbreviations to economize the time in written a full sentence.
As there are many words abbreviate in this way like You : U , People : PPL , Are: R , Two or to : 2 , Thanks: thnx,..
Thank u ^_^