A sex position which a female is mounted and faced forward towards the male. The male then grasps the ass cheeks of the female and bounces it up and down like they were flipping pancakes.
Damn boy I flap jacks the hell out of Tiffany last night. Her ass was flipping like pancakes.
A plate of brown consists of foods that have little to no nutritional value, and are typically deep fried. A true plate of brown will also be accompanied by a dark soda.