Definition of mind one's Ps & Qs in English:
Be careful to behave well and avoid giving offense.
[of unknown origin; said by some to refer to the care a young student must take in differentiating the tailed letters p and q]
- As such, the stealth stingers tell the bipeds to buzz off and mind their Ps & Qs before the bees make 'em R.I.P.
- As a little girl, I was told to ‘mind your p's and q's’ and ‘be a lady’ because I was quite the tomboy.
- He's normally a quiet, sensitive little thing (just like his mum) who minds his Ps and Qs and keeps himself to himself.