calorie bomb 

Any food item, snack, or meal that contains an ungodly amount of calories (and usually fat, too). It is guaranteed to go straight to your waist, hips, and/or ass, blowing your figure to hell in the process.

Guilt and the consumption of calorie bombs go hand in hand, although the former is rarely strong enough to override the impulse to do the latter.

Bob: "Oh man, I just ran five miles, and I was so hungry when I got home that I inhaled an entire goddamn bag of Cheetos."
Larry: "Why would you do that? You just got hit with a calorie bomb."

Jenny: "I think I'm going to order dessert. Mmmmm, chocolate cake."
Susy: "Two words: CALORIE BOMB. Are you sure you still want it?"
Jenny: "Well, not when you put it that way."

calorie bomb by J - Train April 20, 2010

Calorie Bombing 

calorie bombing /ˈkal(ə)rē/ bɑmɪŋ
(Verb)

Sabotaging an unwitting dieter with a gift of a scrumptious variety and post ingestion of said delectable dictating the nutritional fact label to them to convey the general unhealthiness or extreme calorie denseness, then watching them wallow in guilt and shame.

Calorie bombing has to stop in this office. I never would have guessed that truffle was 140 calories. Now my diet is trashed.

Calorie Bombing by emotionSDK March 13, 2012