Angle Queen
Professional
I was just about to suggest yoga shorts. I've only got one pair (I need to fix that!) but they are indeed the best. It's something in how the leg opening seams aren't so fitted and the overall cut of the pant.I have a couple of tennis dresses and I have found the best spankies to wear underneath them are the yoga shorts made by Lululemon.
So give the "yoga" aisle/page a look-see for something that might work.
And LOL, I haven't heard 'em called spankies in a long time. I think that's what we called 'em in HS (decades ago and one state further south). They call 'em "lollies" or "fancy pants" around here. First time I heard the former term, I kept looking for someone to show up and handout lollipops like bank tellers do. And the latter term, don't even get me started on the image that conjures up.