if you tell someone a home truth, you tell them an unpleasant fact, usually something bad about themselves.

It's time someone told that boy a few home truths about his behaviour. (usually plural)

• roll sleeves up
• roll up sleeves
• roll up your sleeves
• roll with it
• roll with the punches
• roll your sleeves up
• Rome wasn't built in a day.
• roof caves in
• roof falls in
• roof over head
• roof over your head
• room to swing a cat
• root and branch
• root-and-branch
• as a rule
• as as they come
• a saving grace
• as a whole
• as best as can
• as best as you can
• as best can
• as best you can
• as bold as brass
• a scandal sheet
• a scaredy-cat