The act of carrying alcoholic liquor at restricted places.
tr.v. brown-bagged, brown-bag·ging, brown-bags.
We got liquor from the regular speakeasy and went driving and brown-bagging all over the city.
using a brown paper bag for your lunch.
(it's a Charlie Brown reference, folks)
Sally: "You had me take my lunch to school in a lunch box...do you know what happened? All the other kids were brown-bagging it!! I felt like a fool!"
Charlie Brown: *sighs*