Nobody sending 💀 is announcing a death. They are reporting their own: I'm dead, as in so amused, so embarrassed or so stunned that they have left the conversation.

The character itself is ordinary. Unicode added Skull (U+1F480) in 2010, taken over from the emoji sets of Japanese mobile phones, and for most of the 2010s it meant what skulls usually mean: death, danger, Halloween, a goth aesthetic. In 2015 it sat at 92nd on Twitter's usage chart.

Then the meaning moved. "I'm dead" and "I'm dying" had long been spoken shorthand for laughing hard, and in the early 2020s younger users began to send the skull as the written version. When TODAY reported in March 2021 that Gen Z considered 😂 something their parents used, the skull was the replacement they named.

That is why 💀 now works more like punctuation than a picture. It signals laughter, but a dry, deadpan kind, with a little self-mockery mixed in: this is so absurd I can't. A row of them, 💀💀💀, turns the volume up.

The older reader / younger writer gap is real, and documented. To someone who learned emoji as small pictures, a skull after a joke can look morbid or alarming. To someone who learned them as tone markers, a reply with no skull at all can look like the joke fell flat.

The literal sense hasn't gone. In a message about illness, an accident or grief, 💀 reads as death, and the joke reading becomes a serious misstep. When the subject is real, use words.