Bless his, her, etc. cotton socks - Idioms by The Free Dictionary
bless his, her, etc. cotton socks
bless (one's) cotton socks
An expression of one's fondness for another person. Primarily heard in UK, Australia. Look at this picture that my sweet daughter drew me, bless her cotton socks!
ˌbless his, her, etc. (little) cotton ˈsocks (British English, humorous) used to express your affection for somebody because of something they have said or done: And the kids brought me breakfast in bed — bless their little cotton socks!