Verb. To shove a White Castle slider directly up your ass, in the hope it will feel better on the way out.
Roommate: “Dude, that White Castle from last night totally hurt coming out this morning. Why aren’t you hung over?”

Me: “I totally browncastled my sliders. Sucked at the time, but I feel like a champ this morning.”
by Hoo Lee Gan September 22, 2019
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