It is definitely colloquial and not a word you’d use everyday, but it is in Duden:
I love how I just automatically accept the German cookie banner without reading it (but understanding exactly what it says). Modern internet ist scheisse.
Might be regional, I certainly know it, I’m from southwest germany.
Northern germany also knows it. Maybe it has something to do with age. It's usage has declined over the years, I think. Maybe because it belittles the underlying issue, as it sounds rather "cute" to a native speaker. Just an educated guess, though.
Bavaria (southeast Germany) agrees. It's colloquial and - maybe regional - but not an uncommon word in my experience.
Re:Chick Corea has died
by avhception on Friday February 12, 2021 @06:22AM
(#26112477)
NRW reporting in, too
Hey, there is somebody wrong in the Internet!!!11
It's a relatively common word. I still remember that I first saw it as a kid in a Garfield comic strip ("Lieber Kummerspeck als gar nichts zu Essen").
focus.de: "Die Wahrheit über Kummerspeck - Wie die Seele uns dick macht"
spiegel.de: "Essen gegen Stress und Frust: Was tun gegen Kummerspeck"
bildderfrau.de: "Warum Kummerspeck so gefährlich ist"
...
I would not call it a common word. But every native speaker who reads more than Facebook status updates should have met it. Being an obvious compound of 2 words really everybody knows it does not require any real learning effort, the first time you see it you understand it intuitively.
A discussion about the passing of a great Jazz musician turns into a discussion about a German word about fat.
#onlyonHN
We didn't manage to divert the discussion towards the advantages of Lisp and Rust or the issues with current practices in job interviews.
The other week I similarly saw a conversation about calendar optimization to not look like Swiss cheese turn towards discussing the process of making Greek yogurt.
Source: native speaker, reasonably literate