To cause a garment, especially a shirt or blouse, to puff out or hang loosely. She bloused the shirt over her belt to give it a more relaxed look.
To tuck the lower edge of a garment into something, such as trousers or boots, so that it billows loosely over the edge. The hikers bloused their pant legs over their boots to keep stones out.
(of a garment) To puff or billow out loosely. Her linen shirt bloused out in the wind.