my personal definition of it is this: a non-essential (or classified essential, but over-the-top, exotic, extravagant, and/or inefficient for the purposes of fulfilling human need) commodity that has an unfortunate capital-T Tendency (as in, the TPRF in which it applies without fail) of being invoked in political discussions, almost always making said discussions objectively worse.
A sub-classification of treats, which I wish more people would directly invoke instead of using the broader term since it's funnier to me, is the 'adventures': escapist, less-than-nuanced fantasies that are, without fail, invoked by people to explain complex political issues.
Any additions? Disagreements? we must synthesize this before it becomes the new tankie in watered-down 'thing i dislike' applicability.
Reminds me that everyone's gonna survive the nuclear war by going into their basement or something, and then they'll get tired of not being able to play video games and eat candy, and leave the shelter to go on a wasteland adventure, and then die in a couple days from radiation exposure. But they'll keep going out anyways.
March 24th, 2035: Man found dead outside the Walmart(r)-cum-Proud Boys Headquarters in Los Angeles, death judged to be due to radiation overexposure without proper PPE. Last tweet from the man, two days before death, reads: "i'm going to be like the courier!"