| labor of love | | | |
| labour the point | | | |
| lab rat | | | |
| laced mutton | | | |
| laced-up | | | |
| ladies' man | | | |
| lady garden | | | |
| lady or tiger | | | |
| lady's man | | | |
| landing strip | | | |
| land in someone's lap | | | |
| land of opportunity | | | |
| land on | | | |
| land on one's feet | | | |
| land poor | | | |
| land the plane | | | |
| lap of luxury | | | |
| large and in charge | | | |
| last burst of fire | | | |
| last-ditch | | | |
| last full measure | | | |
| last hurrah | | | |
| last mile | | | |
| last minute | | | |
| last nail in the coffin | | | |
| last of the big spenders | | | |
| last resort | | | |
| last roundup | | | |
| last straw | | | |
| Last Supper | | | |
| last thing | | | |
| last thing one needs | | | |
| last trump | | | |
| last word | | | |
| latch onto | | | |
| late model | | | |
| late to the party | | | |
| lathered up | | | |
| laugh all the way to the bank | | | |
| laugh a minute | | | |
| laughing stock | | | |
| laughing tackle | | | |
| laugh in one's sleeve | | | |
| laugh one's head off | | | |
| laugh out of court | | | |
| laugh up one's sleeve | | | |
| laundry list | | | |
| lay a finger on | | | |
| lay an anchor to the windward | | | |
| lay an egg | | | |
| lay at someone's door | | | |
| lay by the heels | | | |
| lay down the law | | | |
| lay down the marker | | | |
| lay eggs | | | |
| lay eyes on | | | |
| lay hands on | | | |
| lay it on | | | |
| lay it on thick | | | |
| lay odds | | | |
| lay off | | | |
| lay of the land | | | |
| lay on | | | |
| lay one's head | | | |
| lay one's tongue to | | | |
| lay on the line | | | |
| lay over | | | |
| lay something at the feet of | | | |
| lay store by | | | |
| lay the groundwork | | | |
| lay the wood | | | |
| lay to rest | | | |
| L-bomb | | | |
| lead by the nose | | | |
| lead foot | | | |
| leading light | | | |
| lead nowhere | | | |
| lead on | | | |
| lead someone to the altar | | | |
| lead someone up the garden path | | | |
| lead the line | | | |
| lead time | | | |
| lead up to | | | |
| lead with one's chin | | | |
| leap out | | | |
| leaps and bounds | | | |
| leap to mind | | | |
| learned profession | | | |
| learn one's place | | | |
| learn to walk before one can run | | | |
| least said, soonest mended | | | |
| leather-lunged | | | |
| leather working | | | |
| leave a sour taste in one's mouth | | | |
| leave at the door | | | |
| leave behind | | | |
| leave for dust | | | |
| leave home | | | |
| leave it all on the field | | | |
| leave it alone | | | |