mittens
Used in chat sites, like two thumbs up. A person who likes a response in a thread will post a picture of two mittens with the thumbs pointing upward. Especially used by Discordians, Mythics and Sweets.

Also means sexually stimulating two girls at once by having your hand inside each of their vaginas simultaneously. Similar to a circle jerk or sharies.
I love that post about sharies. I'm giving it mittens and win!