f'ril
A lazy and mean way of saying 'For Real' that people use when they're being sarcastic and doubting you.
F'ril? You're gonna eat all that cake? F'ril? F'ril? You're gonna regret it.
F'ril? You think you're gonna pass? F'ril? F'ril? I've seen you fail before.
F'ril? You think you're better than me? F'ril? F'ril? Please.