The Brown-Bag Special is when a man sits on the toilet with his partner in his lap. The partner takes a shit and it slides between his legs and against his nut sack, leaving it stained brown, before hitting the water.
She sat on my lap in the bathroom and proceeded to give me a Brown-Bag Special
Brown bag special (noun): when you wanna get it in with an ugly bitch and you don't have very much money for a date. You take her to sonic and order a 'brown bag special', a meal for two. Then later when you're plowing her in her stinky fat cunt you can discretely hide her face with the brown bag.
Yeah I wanted to hop in this ugly bitch's badoonkadonk last night n I was niggerbroke so we went to sonic. BROWN BAG SPECIAL!!