A risk of rain/showers/thunderstorms

A chance of rain or showers or thunderstorms.There was a risk of showers so we decided not to go on a picnic today.

Rise to the occasion

To meet the challenge of something.Our teacher rose to the occasion and gave a very good speech at the banquet.

Rise to the bait

To be lured by some kind of bait or enticement.My friend rose to the bait when I offered to help him if he would help me.

Rise and shine!

Get out of bed and begin the day!."Rise and shine!" my father called to me in the morning.

A ripple of protest

A small amount of quiet protest.There was only a ripple of protest when the government raised the gasoline tax.

A ripple of excitement

A series of quiet but excited whispers.There was a ripple of excitement in the concert hall when the singer walked onto the stage.

Ripe old age

A very old age.My uncle lived to a ripe old age.

Rip off (someone or something) rip (someone or something) off

To cheat or rob someone or something.The mechanic at the gas station ripped me off.

Rip into (someone or something)

To attack someone or something physically or verbally.My mother ripped into me when I came home late from the party.

Ring up (something) ring (something) up

To add and record a sale on a cash register.I went to the cash register so the clerk could ring up the items that I had bought.