๐ ๐ปโโ๏ธ represents man gesturing NO: light skin tone, usually shown as a man with his arms crossed in an X shape.
This usually means refusal, disagreement, or signaling that something is not allowed or should stop.
People use it in chat for 'I can't do that' or 'No way'. It also fits when setting boundaries, such as 'Don't do that ๐ ๐ปโโ๏ธ' or 'I'm not interested, sorry ๐ ๐ปโโ๏ธ'.