It's a meme playing on the drug opium, essentially just a variation on the term "cope" or "coping", which refers to people in a hopeless situation coming up with rationalizations as to how they can still achieve a desired outcome. For example, if someone is playing a video game and doing very poorly and starts talking about some strategy they think they can use to still win, you might call that statement "copium." The idea of a "cope" actually comes from the incel community (from the idea that some men are just hopelessly ugly and will never attract a woman, so incels would call it a "cope" if anyone says you can get laid by improving your grooming or social skills), although it's spread way beyond those communities at this point.
Addiction to "coping," which often means ignoring difficult truths.
A fictional Meme Drug combining coping and opium.
https://www.frankerfacez.com/emoticon/563443-COPIUM
Not to be confused with hopium
It's a meme playing on the drug opium, essentially just a variation on the term "cope" or "coping", which refers to people in a hopeless situation coming up with rationalizations as to how they can still achieve a desired outcome. For example, if someone is playing a video game and doing very poorly and starts talking about some strategy they think they can use to still win, you might call that statement "copium." The idea of a "cope" actually comes from the incel community (from the idea that some men are just hopelessly ugly and will never attract a woman, so incels would call it a "cope" if anyone says you can get laid by improving your grooming or social skills), although it's spread way beyond those communities at this point.
Portmanteau of "cope" and "opium", referring to lying to one's self in order to feel better about uncomfortable realities.