Genuinely worse than actual hangovers. You have some vague memory of what it was like last time, but you tell yourself "It can't be that bad..." So you eat your bag of cheese and onion crisps, and at first, it's *not* that bad, but before long, you're burping and tasting them again, and this goes on ALL FUCKING DAY. You tell yourself "I'm not having a bag of cheese and onion crisps ever again", and although you believe it at the time, somehow, you know you will.