To Brown Cap would be to inadvertently poop while trying to break wind. The definition of usually identifies a sold turd as opposed to wet shit (see free poopies, in other words. shart), that benefits from an over exerted make an effort to fart. It can also reference an 'almost' turd beginning to be released while pushing an arduous fart, that is permitted to slip back to the anal area. To have anal sex without a condom, withdraw and allow chick lick the poo off your penis.