oh oh scary!
Oh oh, oh shiver me timbers. SHUT UP MAN! Used as a sarcastic word to pretend you're scared but in reality, you don't give a single shit.
*Arguing on discord as an example*

Stranger: You're so ugly
You: *insert good comeback*
Stranger: Say that again and I will come to your house and kill you
You: Oh oh scary! Shut up man