FIRST
stiffed
to not pay something (usually a tip)
Dive
a bad restaurant
grab a bite
Ritzy
lavish, luxurious, expensive hotel or restaurant
Chow down
to eat quickly
Eat on the run
to eat on the way to work or school
Ate up a storm
to eat a lot
Polished off
to eat something completely
Treating
when someone else pays for someone's meal
Split the bill
to divide and share the cost of the meal
Greasy spoon
an inexpensive local diner-style restaurant
BE + alternating paying
each person takes a turn paying the bill
Wash (something) down
to drink something in order to be able to swallow what you were eating