Do I sound like an infomercial today? I wouldn't say that all of those extended 2 am commercials aren't true - with three easy payments of $29.95 you can have the ass-toner-jiggle-fat-off machine and have a fabulous ass in no time at all!
Possibly true, but why spend nearly $100 to figure it out?
This is what I do while I'm waiting for my laundry to dry. Seriously. There's three minutes left on my dryer and rather than wait in the chaotic laundromat, I take a step outside and I pounce. Roll onto your tip-toes, squeeze your butt tight, repeat. Roll up, squeeze, repeat.
Three minutes later my laundry is dry and my ass and calves are better for it.
You can do these calf-raises while you're brushing your teeth or while you're waiting for the subway. It's subtle enough that people won't think you're TOO weird. But, even if they did, who cares?
Just remember to squeeze your ass tight, and in no time at all, you'll have everyone else wanting to squeeze it too.