J

J/K - Just Kidding
J/P - Just Playing
JAM - Just A Minute
JASE - Just Another System Error
JAT - Just A Thought
JAVA - Just Another Vague Acronym
JFTR - Just For The Record
JIC - Just In Case
JMHO - Just My Humble Opinion
JMO - Just My Opinion
JOKE - Just One Kidding Everyone
JOT - Just One Thought
JTFM - Just The Facts, Mister/Ma'am
JTLYK - Just To Let You Know
JTYWWTK - Just Thought You Would Want To Know

K

< K > - Kiss
KB - Kiss Back
KISS - Keep It Simple, Stupid
KIT - Keep In Touch
KMA - Kiss My Ass
KMF - Kiss Me, Fool
KOC - Kiss On Cheek
KWIM - Know What I Mean?
KYPO - Keep Your Pants On

L

L8R - Later
L&ML - Lies and More Lies
LAB&TYD - Life's A Bitch and Then You Die
LHM - Lord Help Me
LHO - Laughing Head Off
LHU - Lord Help Us
LI - Laughing Insanely or Laughing Inside
LIS - Laughing In Silence
LLTA - Lots and Lots of Thunderous Applause
LMAO - Laughing My Ass Off
LMBO - Laughing My Butt Off
LMK - Let Me Know
LMOL - Laughing Madly Out Loud
LMSO - Laughing My Socks Off
LOL - Laughing Out Loud
LSHISOTS - Laughing So Hard I Spat/Spit On The Screen
LSHTTARD - Laughing So Hard The Tears Are Running Down
LTNS - Long Time No See
LTNT - Long Time No Type
LTR - Long Term Relationship
LTS - Laughing To Self
LY - Love You
LYK - Let You Know
LYWAMH - Love You With All My Heart