LMSD 

Lower Merion School District; I believe this is what the author of the article, Chris Matyszczyk (CNET), was abbreviating/acronaming for.
School Webcam snapped 'partially undressed' kid

LMSD; "a little LMSD soap opera."

LMSD by Dude Jake April 17, 2010

lmsda 

Let me suck that ass

Aye lmsda girl

lmsda by Jjnel12 February 11, 2019

Lmsdd 

Boy “let me suck that dick” (Lmsdd), typically used when addressing a fine copy and paste Latino

Aldebaran LMSDD papi

Lmsdd by Biglongdickboyigottahaveit March 29, 2023