| rise with the lark |
| rivet counter |
| roadblock |
| road less traveled |
| roar back |
| robber baron |
| rob the cradle |
| rocket science |
| rocket surgery |
| rocking horse shit |
| rock on |
| rock the boat |
| rod in pickle |
| rogues' gallery |
| roguish |
| roller-coasterish |
| rolling stone |
| roll in wealth |
| roll of the dice |
| roll one's own |
| roll tape |
| roll up on |
| roll up the sidewalks |
| Roma locuta est, causa finita est |
| romp home |
| room for doubt |
| root cause |
| rope of sand |
| rose-coloured |
| rose-tint |
| rotten apple |
| rough and ready |
| roughen up |
| rough out |
| rough sledding |
| rough trot |
| round the bend |
| round up |
| row back |
| row of pins |
| rubber hose |
| rubber room |
| rub elbows |
| rub it in |
| rub off on |
| rub salt in someone's wounds |
| rub shoulders |
| rub the fear of God into |
| ruby slippers |
| rue the day |
| rug-cutter |
| rule in |
| rule out |
| rule the roost |
| rumor campaign |
| run about |
| run afoul of |
| run amok |
| run a risk |
| runaround |
| run around like a chicken with its head cut off |
| run a temperature |
| run away from |
| run for one's life |
| run for the hills |
| run high |
| run in the family |
| run into the ground |
| runners and riders |
| run off |
| run off with |
| run on |
| run one's name |
| run out |
| run out of town |
| run over |
| run rampant |
| run riot |
| run someone off their feet |
| run someone's file |
| run the clock down |
| run the gauntlet |
| run the show |
| run to |
| runt of the litter |
| run wild |
| run with scissors |
| rush hour |
| Russian roulette |
| race against time |
| race riot |
| rag bagger |
| rainbows and unicorns |
| rain dogs and cats |
| rain on someone's parade |
| rainy day |
| raise hell |
| raise someone's shag |
| raise the line |
| raise to the purple |