An exclamation u say when u get the best blowjob and orgasm. Another definition is if u angry or worried at some shit going on
Tyzo: Baby....oh fuck I think I’m about to cum
Leía: *swallows cum*
Tyzo: OH FUCK
Ex #2
Anglo: r u serious Im gonna be late again (leaves house) OH FUCK I forgot my keys
An expression of confusion.
Me: (wakes up late for work) OH fuckin' Fuck!