1. 'bottom' and 'behind'. Your bottom is the part of your body that you sit on. You can use bottom in conversation and in most kinds of writing. If she could change any part of her body, it would be her bottom. Speakers of American English usually say behind rather than 'bottom'.
Peanut Flour, unopened 1 year. Peanut Flour, opened 2-3 months Lasts up to 9 months in refrigerator. Peanut Oil, roasted, aromatic, unopened 9 months. Peanut Oil, roasted, aromatic, opened 2 months Lasts 4-6 months in refrigerator.
Natural Peanut Butter (without added oil, sugar, and other preservatives) must be refrigerated, and will last up to a couple months. Processed Peanut Butter (with added oil, sugar, and other preservatives) Will last a couple months in your cabinet and a few months in the refrigerator. No, not necessary.