Here's a few:
My DS used to be quite destructive when he was little so my dad would say "that boy could tear up an anvil"
When asked what he was doing by inquisitive kids he would say nunya, what's that? nunya business
MIL would say about bike riding, that's just working your legs to give your lazy a** a ride.
DS & DD 2 yr old twins, she would say at noon "come on bubby, the young and the rest of us is on.