- (especially of a garment) not zipped or zipped up; with the zipper unfastened.
- crazy; demented.
- overwrought; hysterical.
- uncoded(def 2).
verb (used with object), un·zipped, un·zip·ping.
- to open the zipper of.
verb (used without object), un·zipped, un·zip·ping.
- to become unzipped.
verb -zips, -zipping or -zipped
- to unfasten the zip of (a garment) or (of a zip or garment with a zip) to become unfastenedher skirt unzipped as she sat down
- (tr) computing to decompress (a file) that had previously been zipped
v.1939, from un- (2) + zip (v.). Related: Unzipped; unzipping.