An unspecified or unspecifiable object; something one does not know the name of or does not wish to name; dingus, gadget: ''Why weren't you using the gismo?'' ''I was. It didn't work''/ ''What's this gizmo?'' I asked. ''The hand brake''/ Guy tried to shove a Pepsi bottle in his wife's giz
A man; fellow; guy: What's this gizmo have in mind?
[WWII Navy & Marine Corps; origin unknown; it has been suggested that it is fr Moroccan Arabic ki smuh, learned during the invasion of North Africa in 1942]