"Did you see those people move away from me in the elevator after all those other people got off? I couldn't tell if I had bad breath or if it was just elevator osmosis."
When a person becomes aware of an aspect of nerd culture by simply interacting with nerd communities.
"This Warhammer 40K thing is pretty crazy, how did you hear about it?"
"I don't know. I play a lot of video games. I guess I picked it up through nerd osmosis"
Person 1: Bruh, how you lifting so much today? Person 2: Saturated Anabolic Osmosis Person 1: What is that? Person 2: Getting railed in the ass by larger men and stealing their test.