We don't have synonyms for brown-bag yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are brown bag, brownbag and brown bat.
(v) :
(US) Alternative form of brown bag. [(informal, ambitransitive) To carry one's packed lunch from home, either literally or figuratively in a brown paper bag or a lunchbox, rather than purchase it from a cafeteria or restaurant.]
(n) :
Alternative form of brown bag. [A brown paper bag.]
(v) :
(US) Alternative form of brown bag. [(informal, ambitransitive) To carry one's packed lunch from home, either literally or figuratively in a brown paper bag or a lunchbox, rather than purchase it from a cafeteria or restaurant.]
(n) :
Alternative form of brown bag. [A brown paper bag.]