Okay, okay, admittedly they aren't all that mysterious - especially if you give it more than 1.7 seconds of thought - so maybe this list is for people who have only given it 1.6 seconds or less of thought!
- Heavy up: what happens when you go off of your diet or...?
- Muntin: Those comic book characters (Mutt and...?).
- Sub: a sandwich or...?
- On-center: That "centered" feeling you get when you have remodeled your husband's den into a yoga studio...or?
- Double-hung: Uh...something that really belongs in fellow About Guide Cory Silverberg's Sexuality site, or something else...?