Can I say a joke that is extremely offensive on whatsapp?
Why would you be tempted to say something extremely offensive?
I think the joke is really funny.
You need to make sure the people you are sending the joke to are aware it may be offensive. You do not want to upset other people with a joke.
Fuck no, I'm just saying it's kind of offensive but they shouldn't get angry.
They might get angry. Some people find that stuff funny some don't. It is rude to make those kind of jokes when you think that they might not like it.