On Steam, by grinding away doing pointless shit for no reason, you can earn "Trading Cards". These can be converted into "gems" which are collected in "Sacks of Gems". The underlying javascript, though, calls them what they are:
barrels of game goo

Avatar by @DrDubz.
Banner by one of Colin Jackson, Rick Lodge, Steve Noake, or David Severn from Bubsy in: Fractured Furry Tales for the Atari Jaguar.
On Steam, by grinding away doing pointless shit for no reason, you can earn "Trading Cards". These can be converted into "gems" which are collected in "Sacks of Gems". The underlying javascript, though, calls them what they are:
barrels of game goo
It's a shame they didn't go with the glowing green barrel of nukage from Doom but someone did in their hearts at least
It's all in the browser side of things. If they don't obfuscate the code (turning functions and variable names into meaningless letters) you can see the names using devtools available in your browser.
(do not play with devtools if you don't know what you're doing though)
who on earth thought "gems" was better than "barrels of game goo"
in a group chat with a valve employee who will remain anonymous, we established that game goo is a substance with roughly the same properties as cosmoline that you can put video games into to preserve them
This kind of nonsense really makes me worry about Steam. It ain't broke, don't fix it.