there is no problem or difficulty.

We'll be back by six, no sweat, but if there's a problem, we'll call you.

• the left hand doesn't know what the right hand is doing
• the lesser of two evils
• luck into something
• luck of the draw
• luck out
• lull before the storm
• lull into
• lull into a false sense of security
• lull into doing something
• lull into something
• lull someone into a false sense of security
• lull you into
• lull you into doing something
• lull you into something
• lump in throat
• lump in your throat
• mad about
• mad about someone
• mad about something
• made for each other
• made up out of whole cloth
• magic moment
• magic touch
• magic wand
• main drag