How do you ask for space when you feel like a co-worker is getting too personal?

Call Sheriffs deputy then tell to fuck off, press charges

“Um..give me some space...you’re scaring me you fat fvck”

"I keep work at work and personal at home. It's tidier."

Hey ummm listen your alright and all but can you mind your own fucking business please? I mean I like you as a friend but fuck off mmmkay?

I'd avoid them. If I can't avoid them I'd probably just start lieing. Which is cowardly but f it.

Clearly as possible. IE your comments are too personal and making me feel uncomfortable.

I change the subject and if they don't get the hint I tell them to BACK OFF nicely.

Tell them just that. Can't expect people to be mind readers.

Co worker? Blank them out. Go cold and unapproachable.

Say you'd rather not discuss it.

Don't get up in my grill bitch.