- on the dot of something
- outstan-ding
- overload oneself
- out of love
- overfamili-arity
- oddball
- out of step with
- of distinction
- on the mend
- on the eve of
- off Broadway
- one's better half
- oldie
- overman
- out of true
- on the fritz
- oldsters
- on the way out
- oil the wheels of
- on the go
- once-over
- oppo. china
- outer limit
- outspokenness
- over the fence
- of no fixed address
- object of the exercise
- other half
- out-standing
- outer reaches
- oppo
- on one's lonesome
- outrival
- on one's beam-ends
- on this account
- one-horse
- of little account
- oomph
- of the highest quality superlative
- out of hand
- offcut
- over-effusive
- otiose
- outperform
- on the understanding that
- overlooking
- oddness
- one's dole
- orthoepy
- one' cards
- osteopathy
- opaline
- on that account
- on the fence
- omitting
- overstep
- out of control
- on the bread-line
- overhasty
- overseeing
- on one's Jack Jones
- oil someone's palm
- of no account
- outspokenly
- on the money. exclamation precisely
- osculate
- oxbow
- of moment
- on the ark
- opinions
- offsider
- omnium gatherum
- openhandedness
- on hold
- one-off
- overlong
- one in a million
- over the hill
- okay
- overpitch
- out of one's depth
- on the subject of
- on one's Pat Malone
- orotund. bombastic
- on us
- oik
- off center
- over-adventurous
- outflowing
- oldster
- old womanish
- overexcited
- on the breadline
- outstandingly
- on the rampage
- on the mark
- on cloud seven
- ombudsman
- on the top of the world
- one-liners