look up any word, like bootylicious:
1. empty calories
Foods that only contain calories but no additional nutrients like protein, fiber, vitamins and minerals.
Person 1: Would you like some soda?
Person 2: No, that's just empty calories. I'll have juice instead.

Person 1: Want some candy for dessert?
Person 2: Nah, I'll have a baked sweet potato instead.
2. empty calories
A phrase used when the food or beverage offered will not induce inebriation or intoxication. For example, brownies or cookies without marijuana, or a non-alcoholic drink.
Man #1: Hey, want a brownie?
Man #2: That depends, are they "special"?
Man #1: ...No, just delicious.
Man #2: No thanks, empty calories.
rss and gcal