I just sent mine back because they were too big. I have meaty thighs as well and they were loose. Even if I was able to get a smaller size (they were out) they would have had enough room.

While I wouldn't call these tight, I found them to be more fitted in the thigh, and especially in the hip, than Carve Design's Freestyle and Paddler shorts. I would consider those two instead of this one. The correct size for my waist in these looked terrible in the hip and thigh (though that's often a problem for me in most brands).

http://www.backcountry.com/outdoorgear/Carve-Designs-Freestyle-Board-Short-Womens/CRV0005M.html

http://www.backcountry.com/outdoorgear/Carve-Designs-Paddler-Board-Short-Womens/CRV0004M.html