A dress (or other garment) with a zipper, buttons, or other closures in back that is impossible or nearly impossible for the wearer to remove by herself.

The wearer, without the help of another person, is "locked in" the dress.
This dress has buttons all down the back that must all be open to get it on or off; it is therefore a lockup dress.

I can't reach the zipper on the back of this lockup dress.

This jumper is a lockup dress also locks the blouse on your body. Even if the blouse does not have any zipper or buttons in back, the jumper goes on top and must be removed first before the blouse.
by bedd time September 15, 2010
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