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Up! Button Emoji Meaning
TheĀ wordĀ up with an exclamation point after it, shown enclosedĀ in a square. Originally intended to denoteĀ leveling up in a game.
Up! Button was approved as part of Unicode 6.0 in 2010 under the name "Squared Up with Exclamation Mark" and added to Emoji 1.0 in 2015.