A man with his arms forming a circle above his head. ๐โโ๏ธ is a cheerful yes or "sounds fine."
Men send it to confirm plans or to say a problem is solved. Some use it to show a guy stretching after a long day at the desk or warming up at the gym.
Facts
Man gesturing OK ๐โโ๏ธ is an emoji in the people and body category, under person gesture. It became part of the emoji standard in Emoji 4.0, released in 2016. It is a sequence that joins ๐ person gesturing OK and โ๏ธ male sign. Devices that do not know the sequence show those emoji side by side. It comes in five skin tones, from light to dark. On GitHub, Slack and other apps you can type it as :ok_man: or :man_gesturing_ok:. People also look for it with words like โOKโ, โexerciseโ, โgestureโ, or โgesturingโ.