| keel over |
| keep a lid on |
| keep an eye out |
| keep good time |
| keep it moving |
| keep it up |
| keep one's cards close to one's chest |
| keep one's eye on the ball |
| keep one's head |
| keep one's knickers on |
| keep one's options open |
| keep one's temper |
| keep pace |
| keep someone busy |
| keep someone on their toes |
| keep tabs on |
| keep the peace |
| keep up |
| keep watch |
| kick a dog when it's down |
| kick at an open door |
| kick butt |
| kick in the teeth |
| kick loose |
| kick out the jams |
| kick someone when they are down |
| kick the bucket |
| kick the tyres |
| kick upstairs |
| kid-glove |
| kill one's darlings |
| kill two birds with one stone |
| kind of |
| king of all one surveys |
| king of the hill |
| king's ransom |
| kiss-and-tell |
| kiss of death |
| kiss someone's ring |
| kitchen table software |
| knee-slapper |
| knit one's eyebrows |
| knock a skunk off a gut wagon |
| knocking on heaven's door |
| knock on heaven's door |
| knock someone down with a feather |
| knock someone over with a feather |
| knock the living daylights out of |
| know every trick in the book |
| know one's ass from a hole in the ground |
| know someone |
| know someone in the biblical sense |
| know where the bodies are buried |
| knuckle dragger |
| kangaroo court |
| keep a close watch |
| keep an eye on |
| keep a weather eye open |
| keep it between the ditches |
| keep it real |
| keep on |
| keep one's cool |
| keep one's fingers crossed |
| keep one's head down |
| keep one's mouth shut |
| keep one's pecker up |
| keep one's voice down |
| keep shtum |
| keep someone in the loop |
| keep someone sweet |
| keep the bones green |
| keep the show on the road |
| keep up with the Joneses |
| kettle of fish |
| kick ass |
| kick back |
| kicking and screaming |
| kick into touch |
| kick one's heels |
| kicks and giggles |
| kick some tires |
| kick the habit |
| kick up a fuss |
| kid around |
| killing |
| kill the goose that lays the golden eggs |
| kindle-coal |
| kindred spirit |
| king of birds |
| king's cushion |
| kiss and make up |
| kiss ass |
| kiss of life |
| kiss up |
| knee-high to a grasshopper |
| knight of the post |
| knock a buzzard off a shit wagon |
| knock down a peg |
| knock it out of the park |
| knock out |