This meme is a brilliant fusion of gaming culture and quantum chemistry. It shows the various shapes of f-orbitals (those weird-looking electron probability distributions that haunt physical chemistry students) with the caption "Reddit, when a chemist dies."
The joke references the gaming meme "Press F to pay respect" - a funeral scene from Call of Duty where players press the F key to show respect. But here, it's "Press F orbital" because, well, chemists don't deserve normal respects. We get quantum mechanical respects.
Thirty years of teaching and I still can't get students to remember these orbital shapes, but somehow they never forget that stupid video game reference. If only I could harness that power for my final exam...