The act of intertwining the penises of two (gay) men presumably during sex, similar to the two snakes on a caduceus or (as the name suggests) the twisted licorice in Red Vines.
"What is it called when two gay men intertwine their penises? Like the two snakes on the medical stick? Is it called redvining?" -Angela Martin from The Office (Season 9, Episode 8)
A cool roblox Youtuber that originally started small when he was in middle school and made a lot of Mr. Clean and OxiClean jokes when he was smaller and started making more serious content. By the time this definition is being made, he is almost to 300k subscribers and doing well in the Roblox Star Program.