Definition from Wiktionary, the free dictionary
See also: brown-bag
From the brown paper bag traditionally used to carry one's own lunch from home.
- (idiomatic) A short presentation or seminar on a given subject, especially one given at lunchtime.
- Did you attend the brown bag Tuesday on healthy exercise habits?
- To carry one's lunch from home, as in a bag, rather than purchase it from a cafeteria or restaurant.