Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

WORD ORIGIN

1925, probably an agent noun from zip (v.1). The trademark taken out on the name that year applied to a boot with zippers, not to the "lightning fastener" itself, which was at first called a zip.

Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.