The cutest thing ever.

When someone goes to the gym and spends 90% of the time on their phones scrolling through social media

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.

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.

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

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