Idioms  K - O   [K] [L] [M] [N] [O]

K
	Keep an eye on someone/something		Keep one's bed
	Kick the bucket	Kill time	Know by heart
L
	The last/final straw	Let someone know
	Be like taking candy from a baby
	Be like the cat that got the cream		Low-key
M
	Make ends meet	Feel / Look like a million dollars
N
	Not hold water
O
	Be on the tip of someone's tongue	Once in a blue moon
	Out of the blue	Out of the frying pan and into the fire
	Be over the hill