Depraseed

Listen up, buttercup. The joke is that if "depressed" was spelled "depraseed", then you could pick out the letters that correspond to numbers, like A=1, B=2, C=3 and so on. So, depraseed would be 4, 5, 16, 1, 19, 5, 5, 4 which the joke writer incorrectly converted to 1, 2, 5, 9. So this dude isn't just depressed, he is also failing math. You probably are too, aren't you?