There really is nothing too exciting about the meaning, sorry to say. We chose it because it was clever, had semi-subtle offensive overtones, and wasn't as childish as our second choice of KFCBUTTSEX
Furthermore, if there was any overt justification for why we chose gas chambers, it’s because we wanted to reference Hitler, who’s [sic] gas chamber antics are always offensive to people. His name was mentioned a lot when we were discussing what to spell.
The phrase, "KJU GAS CHAMBERS" refers to the North Korean leaders mysterious and brutal prison camps, where entirely families have reportedly been gassed.