The materials (generally metals but also parts such as gears, springs, screws, electronics, woods etc) used in manufactoring products made in China. Which vary in performance/quality due to disreputable quality control. Which in turn, leads to the same products potentially being different, and in rare cases, even dodgy.
"I don't understand! We have the exact same gel blasters, why is yours better than mine?"
A type of low quality steel , typically in tools. Most samples are low quality mild steel, or overhardened carbon steel. A good way to tell if an object is made of chinesium is checking the stamp. If the stamp says "H.S.S.", "HSS" or similar and is labeled "Made in China/Taiwan" it is probable chinesium. Another way to see is if it breaks or becomes dysfunctional very quickly.
Damn, that drill bit is dull as heck and it snapped in half... Definitely chinesium.
Wow, look at those chinesium screws. They are already stripped.
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.