Fall quarter was just a tall order
A “tall order” is a big challenge / difficult task. Getting through the Autumn, (“fall”), was a struggle for Chance because this is the time of year when he lost his “big homie” Rod mentioned in the lines just before.
He plays off the season “Fall” with the “fall” (trip down from drugs) mention in the previous line. He’s literally doing the drugs just to make the time go by faster or to get through it.
Also suggesting that he was attending college in the fall of 2011 but it wasn’t for him. He dropped out after a day and continued rapping.
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