I would not recommend anyone eating "slim jims". Those things are loaded with carbs and salt! I remember buying a couple of them and eating one only to look at the label and freaked out. I threw the rest of them out.

Better solution would be adding butter, mayo or olive oil to foods. Each tablespoon has around 100 calories or more. You can use olive oil and vinegar on salads, saute meats or veggies in it as well.