A state of mind, where deep but incoherent thought comes wordlessly. A lonely mental abstraction; not necessarily gloomy but often so. When you emerge from a brown study it is often difficult to remember what you have been thinking about.
Amanda looked out at the rain and the leaden sky. She was alone. At times like this she was prone to quote melancholy poetry and then fall into a brown study.
When a guy has his woman bent over the front of the toilet and he's hitting it from the back, just before he finishes, he puts her face in the toilet water to enhance their(his) climax.
I got the brown apple bobber in my girl's parents' bathroom last night
DJ: And now bring your attention to beautiful Lexus who will be performing the infamous Brown Penguin...
Guy #1: Oh my god, that stripper just squatted out a deuce the size of a Pringles can on the stage!
Guy #2: Yup, she just pulled the old Brown Penguin... Seeing that was definitely worth a dollar...