Bart: I Didn't Know You Played The Guitar, Otto-Man!
Bart: I didn't know you played the guitar, Otto-Man!
Otto: Hey, that's all I <did> in high school!
-- "Otto Show"
Otto: Get off the bus or forever hold your peace, little dudes!
Bart: Otto, you know I respect you. I mean, you always let us throw stuff at cars and try to tip the bus on sharp turns....
Bart: Hey Otto! Hey Otto-man! Otto: Hey Bart-dude!
Bart: Any new tattoos, Otto? Otto: Ho! Funny you should ask, man....
Otto: [humming into the bus microphone] Bart: Hey, Otto, can I use that microphone?
Otto: Sorry, Bart-dude, it's for emergencies only. -- on the bus, "Bart the Daredevil...
Bart: You can do it, Otto! You're the coolest adult I ever met!
Otto: Wow! I've never been called an adult before....
Bart: Please, Dad? If you let Otto stay, he'll help around the house and chip in a few bucks whenever he can.
Homer: All right, he can stay. But I get to treat him like garbage....
Otto: Can I at least get my stuff? Landlord: All I found in there was a jar of mustard and a couple of old `Psycho' magazines.
Otto: Wow! I have mustard? -- Otto gets evicted, "Otto Show...
Bart: [reading his history book while boarding the bus] Otto
Hey, Bart-dude! Whoa, you little freaked! [?] Ba...
Bart: Have you seen Milhouse? Owner: No, now go away
we're racing for the title of the champion of the universe....
Bart: Otto, I'm going to leap over Springfield Gorge on my skateboard.
Otto: You know, Bart, as the only adult here, I feel I should say something?...