| living death | | | |
| living end | | | |
| living proof | | | |
| loaded for bear | | | |
| loaded language | | | |
| loaded word | | | |
| load of shit | | | |
| load up | | | |
| load up on | | | |
| loaf about | | | |
| loaf around | | | |
| locked up | | | |
| locker room humor | | | |
| lock horns | | | |
| lock into | | | |
| lock someone up and throw away the key | | | |
| log off | | | |
| lone gunman | | | |
| lone it | | | |
| Lone Ranger | | | |
| long arm | | | |
| long arm of the law | | | |
| long-burning | | | |
| long drink | | | |
| long-felt | | | |
| long finger | | | |
| long green | | | |
| long hour | | | |
| long in coming | | | |
| long in the tooth | | | |
| long odds | | | |
| long pork | | | |
| long row to hoe | | | |
| long run | | | |
| long screwdriver | | | |
| long shot | | | |
| long since | | | |
| long story short | | | |
| long time | | | |
| long-time listener, first-time caller | | | |
| long time no hear | | | |
| long time no see | | | |
| look ahere | | | |
| look as if one had lost a shilling and found sixpence | | | |
| look as if one has lost a shilling and found sixpence | | | |
| look before one leaps | | | |
| look down on | | | |
| look down one's nose | | | |
| look down upon | | | |
| look for a dog to kick | | | |
| look for number one | | | |
| look forward to | | | |
| look here | | | |
| look-in | | | |
| look into | | | |
| look off | | | |
| look on | | | |
| look on the bright side | | | |
| look on the bright side of it | | | |
| look on the dark side | | | |
| look out | | | |
| look out for number one | | | |
| look out for someone | | | |
| look over one's shoulder | | | |
| look the other way | | | |
| look the part | | | |
| look through | | | |
| look to | | | |
| look up | | | |
| look up and down | | | |
| look up to | | | |
| look what the cat's dragged in | | | |
| loom large | | | |
| loose cannon | | | |
| loose end | | | |
| loose ends | | | |
| loose lip | | | |
| loosen someone's lips | | | |
| loosen someone's tongue | | | |
| loosen the apron strings | | | |
| loosen the purse strings | | | |
| loose tongue | | | |
| lord it over | | | |
| lord of gingerbread | | | |
| lord of the flies | | | |
| Lord's Supper | | | |
| Lord willing and the creek don't rise | | | |
| lose face | | | |
| lose ground | | | |
| lose it | | | |
| lose one's battle | | | |
| lose one's bottle | | | |
| lose one's cool | | | |
| lose one's head | | | |
| lose one's heart | | | |
| lose one's mind | | | |
| lose one's shirt | | | |
| lose one's shit | | | |
| lose one's temper | | | |
| lose one's tongue | | | |