Or Else

1. Used to say what will happen if something is not done.

Ex: You have to leave, “or else” I will call the police.

2. Used to say what another possibility is.

Ex: He thinks he can do it, “or else” he is not interested.

3. Used as an angry expression to threaten someone without saying what exactly the threat is.

Ex:  Do what I say, “or else.”