I love this forum, everyone is always so helpful- thank you both so much!
Furwise- I do not have it clipped or pulled back at all. It is very shapely, hugs the mannequin well. This shape is what had me thinking it might go underneath something. I think you're correct, though, that it would be considered a wiggle dress.
Rue_de_la_Paix- Sheath dress is also a name I was looking for! Simple style terms like this are so helpful to me, thank you.