nursery transplant - one's orders
- on the nose
- on the occasion of
- on the off chance
- on the one hand
- on the one hand ... on the other hand
- on the other hand
- on the outs
- on the outside
- on the part of someone
- on the pavement
- on the phone
- on the plea of
- on the plus side of the account
- on the pretext of
- on the pretext that
- on the prowl
- on the qui vive
- on the quiet
- on the record
- on the reverse
- on the right
- on the right side of thirty
- on the road
- on the rocks
- on the rope
- on the run
- on the run all day
- on the scene
- on the score of
- on the scout
- on the sea
- on the side
- on the skid
- on the skids
- on the skirts of the wood
- on the slant
- on the sly
- on the small side
- on the spot
- on the spur of the moment
