| knock someone flat | |||
| knock someone off their perch | |||
| knock someone's block off | |||
| knock some sense into | |||
| knock the stuffing out of | |||
| know beans about | |||
| know from a bar of soap | |||
| know no bounds | |||
| know one's own mind | |||
| know one's way around | |||
| know someone from a can of paint | |||
| know someone from Eve | |||
| know the drill | |||
| know what is what | |||
| know which end is up | |||
| knuckle down | |||
| knuckle sandwich | |||
| Kool-Aid smile |