| labor of love | | | |
| laced-up | | | |
| lady's man | | | |
| land on | | | |
| lap of luxury | | | |
| last full measure | | | |
| last nail in the coffin | | | |
| last straw | | | |
| last trump | | | |
| late to the party | | | |
| laughing stock | | | |
| laugh out of court | | | |
| lay an anchor to the windward | | | |
| lay down the law | | | |
| lay hands on | | | |
| lay off | | | |
| lay one's tongue to | | | |
| lay store by | | | |
| L-bomb | | | |
| lead nowhere | | | |
| lead the line | | | |
| leap out | | | |
| learn one's place | | | |
| leather working | | | |
| leave for dust | | | |
| leave it at that | | | |
| leave off | | | |
| leave someone holding the baby | | | |
| leave someone out in the cold | | | |
| leave the ball in someone's court | | | |
| leave things be | | | |
| legal beagle | | | |
| lemon law | | | |
| les jeux sont faits | | | |
| let bygones be bygones | | | |
| let fly | | | |
| let it be | | | |
| let off | | | |
| let one's hair down | | | |
| let's get this circus on the road | | | |
| let's not and say we did | | | |
| let someone go | | | |
| let something slip | | | |
| let the buyer beware | | | |
| let the chips fall where they may | | | |
| let them eat cake | | | |
| let things alone | | | |
| let this cup pass from me | | | |
| level best | | | |
| level off | | | |
| level with | | | |
| licence to print money | | | |
| lick into shape | | | |
| lick my balls | | | |
| lick one's wounds | | | |
| lick someone's ass | | | |
| lick the pants off | | | |
| lie back and think of England | | | |
| lie ill in one's mouth | | | |
| lie low | | | |
| life and soul of the party | | | |
| life of its own | | | |
| life of the party | | | |
| life's a bitch | | | |
| lift one's game | | | |
| light a fire under | | | |
| light bucket | | | |
| lighten someone's purse | | | |
| light in the loafers | | | |
| lightning fast | | | |
| lightningly | | | |
| lightning strike | | | |
| light someone's ass up | | | |
| lights-out | | | |
| light up | | | |
| like a bull at a gate | | | |
| like a chicken with the pip | | | |
| like a duck takes to water | | | |
| like a man possessed | | | |
| like butter on a bald monkey | | | |
| like it or lump it | | | |
| like no other | | | |
| like someone owns the place | | | |
| like that | | | |
| like the sound of one's own voice | | | |
| lily-livered | | | |
| line of attack | | | |
| line of fire | | | |
| line someone's pockets | | | |
| linger | | | |
| lionheart | | | |
| lip service | | | |
| little-ease | | | |
| little mad | | | |
| little strokes fell great oaks | | | |
| live down | | | |
| live in the shadow of | | | |
| live one | | | |
| live paycheck to paycheck | | | |
| live up | | | |