Como usar o Phrasal verb ''Come Off''

It is used the same way as "come across", in the sense that whatever it is you're talking about is perceived a certain way by others.

If you don't greet the party guests, it can come off as rude. (Se você não cumprimentar os convidados da festa, isso pode ser considerado mal educado).

There's another context in which it can be used which is more closely related to perhaps the first thing that comes to mind when you hear "come off":

The bottle lid came off. (A tampa da garrafa se soltou/saiu fora)