The raised back of hand emoji depicts an upraised hand.
Unicode: U+1F91A
The raised back of hand emoji (🤚) shows the back of a hand raised, often representing a gesture of waving or saying hello. It can also indicate stopping or halting an action, or be used to express surprise or confusion.
"🤚 Hi there! How's it going?"
"🤚 Hold on a minute, let me think about that."
"I was so confused by the instructions that I just 🤚."