and one (more) for luck

something that you say when you add one more of something for no reason.

I want you to swim ten lengths, and one for luck.

• read the small print
• read the writing on the wall
• read up on
• read up on something
• ready cash
• ready money
• read your mind
• ready to drop
• ready to roll
• real McCoy
• reap a harvest of
• reap a harvest of something
• reap the harvest of
• reap the harvest of something
• reap the whirlwind
• reap what sow
• reap what you sow
• rear-end
• rear-end something
• rear its head
• rear its ugly head
• received wisdom
• recharge batteries
• recharge your batteries
• reckon with