| LTMS | | laughing to my self |
| LTMSH | | Laughing unTil My sides Hurt |
| LTNC | | long time no chat |
| LTNC | | long time no see |
| ltnh | | long time no hear |
| ltnsoh | | Long time, no see or hear |
| ltntlk | | long time no talk |
| ltntx | | long time no text |
| ltntxt | | long time no text |
| LTO | | Linear Tape Open |
| LTPLM | | little things please little minds |
| ltr | | later |
| ltr | | left to right |
| ltr | | litre |
| ltr | | long term relationship |
| LTSA | | Land Transport Safety Authority. |
| LTSN | | Learning and Teaching Support Network |
| lttpot | | laughing to the point of tears |
| LTUAE | | Life, The Universe, And Everything |
| ltw | | Lead The Way |
| ltwwk | | Let the Whole World Know |
| LU2T | | love you too |
| lubfao | | laughing your big fat ass off |
| lufthansa | | Let's Us FLirt Together And Never Seperate Again |
| LULAB | | Love You Like A Brother |
| lulafklc | | love you like a fat kid loves cake |
| lulas | | love you like a sister |
| lulas | | love you like a sister' |
| LULT | | Line Unit Line Termination |
| LUMED | | love you more each day |
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