From The Collaborative International Dictionary of English v.0.48:
Zip \Zip\, v. i.
To make, or move with, a sound like a zip[1].
[Webster 1913 Suppl.]
From The Collaborative International Dictionary of English v.0.48:
Zip \Zip\ (z[i^]p), n. [Imitative.]
1. A hissing or sibilant sound such as that made by a flying
bullet.
[Webster 1913 Suppl.]
2. a quantity of no importance. [informal]
Syn: nothing, nihil, nichts, nix, nada, aught, cipher,
cypher, goose egg, naught, nil, zero, zilch.
[WordNet 1.5]
3. a device for locking together two toothed edges by means
of a sliding tab.
Syn: slide fastener, zipper, zip-fastener.
[WordNet 1.5]