assuming you mean that you have an intellectual disability, it’s totally fine if you wanna use that word to define yourself – i won’t tell you what to do. but maybe be aware when you use it with no other context as an insult to call people dumb to everyone else it still just seems like you’re being hateful to intellectually disabled people. and if you’re not intellectually disabled and you’re just saying ‘I’m a proud retard’ as a joke or something, i dunno, go fuck yourself i guess