When you are told so often about your gcses and what you need for them that you tend to spew random facts in inappropriate scenarios. Gcse syndrome also means you understand memes that otherwise make no sense.
Friend "bro i wanna jump off a cliff"
You "yeah i wanna do an eva smith"
Friend "bruh you got a serious case of gcse syndrome there"
Higher portion of cigarette to cannabis but can still get you high with a substantial amount
People smoke weedarettes when craving a cigarette and a high