A man forming an X with his arms. ๐ โโ๏ธ is a hard "no way" from a man's point of view.
Men send it to refuse plans, reject food they hate, or veto a bad idea from the group chat. It reads as a firm no with a hint of humor, like a referee waving off a goal.
Facts
Man gesturing NO ๐ โโ๏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 NO 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 :ng_man: or :no_good_man:. People also look for it with words like โNOโ, โforbiddenโ, โgestureโ, or โhandโ.