Homer: Woo-hoo! I'm a college man! I won't need my high school diploma any more!

Homer: Woo-hoo! I'm a college man! I won't need my high school diploma
any more! [sets fire to it and starts singing]
I am so smart!
I am so smart!
I am so smart!
I am so smart!
S-M-R-T!
I mean, S-M-A-R-T...
-- You were saying?, "Homer Goes to College"

Related:

• I am so smart I make
  myself sick...
• In this world, you have to be oh so smart or oh so pleasant.
  I spent years being smart. I recommend pleasant...
• I am perfectly sane,
  and so am I...
• I am schizophrenic,
  and so am I...
• Smartness runs in my family. When I went to school I was so smart my teacher was in my class for five years.
  George...
• Gee, do you work here?
  And I always thought you were so smart...
• I'm mad and
  so am I...
• Roses R Red. Violets R Blue. I'm Schizophrenic,
  and so am I...
• I'm not so think as you
  drunk I am...