The cutest thing ever.

any advanced technological device, usually pointless and/or confusing. similaly: gadget, widget, whatchumacallit, etc.
palm pilots, global positioning systems, radar detectors, digital camera widgets, generally anything small and electronic.

Something crazy. Something someone would not usually do that's considered mad.

Gizmo is that little creature from the movie Gremlins and Gremlins 2. He was the nice gremlin.............

Much like the gremlin Gizmo, only in human form. A spoiled child. The child is cute and cuddly until you piss them off by telling them the dreaded word "No" then they turn into a hideous little monster.

1. Electronic device, gadget, ...
2. Reference to the Gizmo5 Project, a VoIP company

Derogatory term used to describe someone of Japanese descent. Derived from the fact that these people are always gizmo-ing about and making crazy devices to do all sorts of perverse things that only the Japanese could think of.

Try calling your Japanese friend a gizmo, and you'll see just how right it feels.