Lunch and dinner, but as a kid I called the everyday evening meal supper, as my parents did, and once in a while I still do slip and say supper. Growing up, we only called it dinner when it was something special, like if we had company or went to my grandparents' house for a more formal meal, usually on a Sunday afternoon around 3:00 or on holidays. Dinner meant we were sitting in the dining room instead of the kitchen and using the good china and cloth napkins.
As a NYer and LIer, yes we stand ON lines, as in "get on the end of the line". In my mind, I'm not part of the line (in it), but rather standing on an imaginary line on the ground. Also, shopping carts here are sometimes called wagons.