Scotland and the EU Stupidity Border

Listen up, buttercup! This joke is basically saying Scotland and the EU are super dumb because they "border" on stupidity, get it? It's a play on words, see, because Scotland actually borders England, and the UK used to be part of the EU, so it's like, a double whammy of dumbness! You probably think a border is just where two countries touch, but in this case, it's where dumb meets dumber!