Idioms Starts With O
Off
the beaten track (path )
Off
the top of your head
Off
the-wall
Off
your rocker
Old
hat
Old
wives' tale
On
a shoestring
On
cloud nine
On
pin and needles
On
someone's case
On
tenterhooks
On
the ball
On
the cuff
On
the double
On
the fence
On
the fritz
On
the horns of a dilemma
On
the hot seat
On
the rocks
On
the ropes
On
the spur of the moment
On
the warpath
On
top of the world
Once
in a blue mood
One
good turn deserves another
One-horse
town
One-track
mind
Open
a can of worms
Other
side of the coin
Out
in left field
Out
in the boondocks
Out
like a light
Out
of here
Out
of sight, out of mind
Out
of the clear blue sky
Out
of the frying pan and into the fire
Out
of the mouths of babes
Out
of the woods
Out
on a limb
Over
a barrel
Over
the hill