I gotta share this, I laughed so hard at it. It's so funny and perfectly delivered by the voice actresses, especially Nelson's line, I was laughing so hard I actually woke up the guy who sleeps in the upper bunk bed heh
It's S28E14 Fatzcarraldo. In this scene Lisa was the school journalist.
Lisa: Here at Springfield Elementary, detention has many names.
Purgatraz, The Skinner Sheraton, Spitball Alley, The Bully Pen, 311 Worth, Little Devil's Island and Dead Man Chalking. And I am here with the legendary Nurple Purpler Nelson Muntz.
Nelson, let me get right to it. "Haw-haw!", Where did that come from?
Nelson: Um... wow. First of all, great question. I guess I just saw a jerk doing something lame, and I wanted to make the dope feel like a dingus.
Lisa: Well, Mr. Muntz, I just happen to have one of those "dingai" right here. Milhouse, how does it feel to get a full Nelson?
Milhouse: The first haw isn't that bad. But the second one is devastating.