tied jacket
A method, similar to tied shirt, of wearing a jacket so that the midriff is exposed. May include either conventional-length jackets that have been modified, creating a crop top, or those specifically designed to be cropped. Notable wearers of the tied jacket include Agnes Tachyon and March 7th.
This is not for cases of a jacket's sleeves being tied shut individually or together. For those, either sleeve tied shut or sleeves tied together as applicable.