stibi
stibi is a term that can refer to several things, most commonly a nickname or a shorthand for antimony. Antimony is a chemical element with the symbol Sb and atomic number 51. It is a metalloid, meaning it has properties of both metals and nonmetals. Antimony is a silvery-white, lustrous, brittle substance. It is found in nature primarily as the mineral stibnite, which is antimony sulfide. Historically, antimony and its compounds have been used for a variety of purposes, including in ancient cosmetics, as a medicinal agent, and in alloys to increase hardness.
In a more informal context, "stibi" might be used as a nickname for a person or even