The fast up button emoji depicts an upward-pointing arrow.
Unicode: U+23EB
The fast up button emoji (⏫) is a simple, stylized icon representing an upward-pointing arrow. It is commonly used to convey the idea of something increasing, rising, or moving upward at a rapid pace. This emoji can also signify progress, growth, or advancement.
"Stock prices ⏫ after the company announced record profits."
"Don't forget to ⏫ your latest project files to the cloud."
"My mood is ⏫ today! Nothing can bring me down."